Posted by wallet
I have used the Ericsson HBH-10 and HBH-15 Bluetooth headsets with both the T20s (with adaptor) and T39m. These look the same, and are used the same - a hook over the ear. They are very comfortable and i use them whilst driving, running and cycling even!
Here are some links to show you them:
HBH-10
http://www.sonyericssonmobile.com/au/spg.jsp?template=PS1&B=ie&PID=9564&LM=PSM_V
HBH-15
http://www.sonyericssonmobile.com/uk/spg.jsp?template=PS1&B=ie&PID=9870&LM=PSM_V
HBH-20
http://www.sonyericssonmobile.com/uk/spg.jsp?template=PS1&B=ie&PID=9905&LM=PSM_V
The sound quality is very good with both.
My only complaint is that I get a headache after about 10 minutes of an actual phonecall (but not if waiting for a call) and I get sharp headaches after 20 minutes. This is accompanied by a toothache-like sensation or tingling teeth! However, the headaches are not a strong as the feelings I get with using a mobile phone directly. And i think that it is likely that the central nervous system and our health will be affected with prolonged exposure.
And please - I am not wanting to have all the posts repeated about the research that has already been covered in the other Topic on the new Bluespoon headset. Of course, the bluespoon will have been tested to meet standards, but there is no evidence to prove these standards are safe.
I am interested in hearing about actual experiences (not research) from people who use wired/wireless hands free kits, and bluetooth for longer than 20 minutes at a time, very frequently. I clock up over 3000 minutes a month every month.
Bluetooth headsets provide good sound quality, and not the buzz that people report hearing when i call them on wired hands free kits. Maybe you know of some hands-free kits that don't produce such a buzzing sound?
And we all know about the *industry* research that claims that there is no conclusive research to prove that mobile phones are harmful - but equally the research does not prove that they are safe either - most of the research is funded by the industry and is not independent....but this disregards the fact that many people who use mobile phones can "feel" the effects and often report headaches on that side of the head with prolonged use.
Recent research has uncovered crucial areas that haven't been studied before such as
http://news.bbc.co.uk/hi/english/health/newsid_1805000/1805367.stm
The researchers themselves admit they do not know exactly what the risks are of sustained exposure to mobile phone electromagnetic radiation. To quote from another article, "Mobile phone manufacturers should have funded research into that question before they put them on the market - if they were pharmaceutical products they would have to have been pre-tested." We need independent research into prolonged use!
Quoted from:
http://news.bbc.co.uk/hi/english/health/newsid_314000/314363.stm
It is such a serious issue that has prompted the UK Government to spend £7,400,000 on a research project.
And yes, we all have heard the mobile phone companies shouting loud about that piece of research that might suggest that handsfree kits with wires might be more harmful, and that bluetooth is a lower power - BUT I am talking from experience of using bluetooth day after day.
I work in the Internet industry and support alot of new technology, but we also have to be critical of new ideas that may have serious health implications and adopt a precautionary principle with research and marketing/press based on this research.
With this in mind, and having heard that the brand new HBH-20 is *really good* sound quality and range, I am now considering purchasing the Ericsson HBH-20 which has a receiving/tranmitting bluetooth base unit located away from your head (brain). The sound is transmitted by a wire to an earpiece and dangling microphone.
Now moving onto the newcomer - the Bluespoon - this headset is very different from the Ericsson Bluetooth products mentioned above. Having seen the pictures of the Bluespoon - this device is directly in the ear channel - i would be concerned about the health implications of this bluespoon device - it will be transmitting bluetooth waves (the **same frequency as your microwave oven**!) right in your head - much closer to your brain, nerves and tissue than the ericsson ones.
I would prefer a device that is located away from the head (in a shirt pocket maybe) & wireless from the mobile phone.
This is why I will not be buying the Bluespoon. Those who have been waiting for it have been waiting longer than was originally suggested as a release date. There will always be problems and often delays with new technology when it is first released, and this goes for new mobiles too.
So I will be buying the Ericsson HBH-20, which friends tell me has much better range and sound quality than other available bluetooth headsets and is only the size of a 50 pence piece.
[ This Message was edited by: wallet on 2002-02-11 14:13 ]
Posted by adamrj
Hmm,
A few things - interesting you mentioning getting a headache. Sounds improbable, but I had a prototype R520 for a bit, and started getting splitting headaches. I never usually get them, so the only thing I can reasonably put them down to was this phone.
Handsfrees - ones made by the phone manufacturer should work without a buzz. Cheap copies are absolutely useless.
No one's answered this yet, but I still wonder why Bluetooth signals should be more dangerous than the actual phone's signals. Surely they're less powerful as they travel a much shorter distance.
Same frequency as a microwave... maybe, but so what. Have you had any success cooking your curry with a T68?
Finally, some researchers came up with the idea that a corded handsfree is more dangerous than just the phone as it acts as an aerial with your head at the top!
Adam
Posted by wallet
[quote]
On 2002-02-11 14:55, adamrj wrote:
Hmm,
[I had a prototype R520 for a bit, and started getting splitting headaches. I never usually get them, so the only thing I can reasonably put them down to was this phone]
Well, it would be the radiation from the phone, which is common to most mobile phones (not just the R520) and the strength varies from phone to phone. The headaches you got that were noticible with this phone might suggests that there are side effects that are more noticable with certain phones. Helath implications might be present with other phones that you do not feel, but exist.
[No one's answered this yet, but I still wonder why Bluetooth signals should be more dangerous than the actual phone's signals. Surely they're less powerful as they travel a much shorter distance.]
My point is that in theory, that might be so, but in experience there are headaches that i am experiencing using bluetooth. I mention the Bluespoon because it is positioned so much closer to the brain, nerves and tissue.
[Same frequency as a microwave... maybe, but so what. Have you had any success cooking your curry with a T68?
]
No, my curries are hot enough already! It is not just the cooking/heating/warmth aspects of microwaves, but other health aspects of using mobiles such as how electromagnetic radiation from mobile or Bluetooth can affect the Central Nervous System.
[Finally, some researchers came up with the idea that a corded handsfree is more dangerous than just the phone as it acts as an aerial with your head at the top!]
Yeah, that research has been discussed in the other Bluespoon forum. I suppose that the bluetooth devices might also use our heads as a magnified aerial.
In this forum, instead of research posts (and arguments), I would be interested in hearing from more people who have also experienced similar headaches or side effects, and perhaps solutions they found.
Thanks for your post Adam.
[ This Message was edited by: wallet on 2002-02-11 15:21 ]
Posted by Npalamidis
This info is taked from bluetooth.com
Unlike many other wireless standards, the Bluetooth wireless specification includes both link layer and application layer definitions for product developers which supports data, voice and content-centric applications. Radios that comply with the Bluetooth wireless specification operate in the unlicensed, 2.4 GHz radio spectrum ensuring communication compatibility worldwide. These radios use a spread spectrum, frequency hopping, full-duplex signal at up to 1600 hops/sec.
Almost all Digital Wireless Headsets in the market made by Siemens, Panasonic, Sony, GE, Vtech use the same Radio Wave 2.4 GHz.
So I don´t think is something about the Radio Frecuency.
if I´m wrong please let me know!?
Posted by wallet
reading that, I'm now getting a headache and I'm nowhere near a phone or bluetooth headset.
thanks, Npalamidis, for summary of one aspect of how the bluetooth mobile phones operate technically, and suggests that the mobile phones operate on similar frequencies to each other. I guess you mean that the headaches are not specific to one mobile phone, but could potentially be triggered by any mobile phone/bluetooth. However, I don't want this to become a technical/research topic, as it might deter people from contributing if they don't understand spread spectrums, frequency hopping, etc.
I would be interested in hearing from other users, like Adam, who have also experienced headaches with frequent or prolonged use of mobile phones and/or bluetooth headsets. Also, any solutions they found that allowed them to continue using mobile phones that prevented the headaches and sharp pains.
Mark
[ This Message was edited by: wallet on 2002-02-11 16:33 ]
Posted by T39andcounting
I have got headaches in the past from using phones, both mobile and landlines. This is usually due to bad quality (in my opinion) than radiation, etc. If you are concentrating on listening to a bad line for 20 minutes, whatever type of phone.
With the headset debate, one thing I heard was that, as well as acting as an aeriel for the phone, the effect could be compounded by walking around with it perminantly plugged into your ear. (would you walk around with the phone tapped to your head?). The same could probebly be said for bluetooth - lower radiation values, but far larger lenth of time close to your head if you leave it there when your not talking!
Posted by wallet
In response to T39andcounting,
I should explain that I do not normally get migraines, or even headaches, and am fit and healthy. My hearing is fine.
The reason that I am concerned about this is the intensity of the pains that I experience can be very sharp sometimes, especially when a phone is right next to my head. After using a bluetooth headset (with the mobile at a distance) for half an hour, the sensation is not as sharp, but duller and hangs around for a while after using the headset.
I recently had a very sharp pain when I placed the T20s with the attached bluetooth adaptor dba-10 (it was on by mistake) next to my head to make a call. The pain came immediately instead of after 10-10 minutes and left me with a throbbing sensation afterwards. However, I do not normally use the T20 like this, and this was not the first time I had experienced sharp pains like that. It's just the most recent example. I do not use the dba-10 adaptor (obviously) on the T39 and still get similar headaches with the bluetooth headsets.
I do not get headaches using a landline, which in my area is no different in signal quality than the T39 or T20 mobiles using the bluetooth. So it is not because of any poor quality signal on the mobile or bluetooth.
I do not leave the bluetooth adaptor next to my head when not using it, and I do not have the bluetooth "on" on the phone all the time (i use automatic to conserve the battery).
T39andcounting, your headaches may be due to poor reception quality during long conversations, but that is not my experience.
I also appreciate your thoughtful input.
Mark
Posted by jh67
Its a very interesting topic,..and I guess something that will be discussed for a long time.
Maybe I'm not the right person to give an opinion on this, but I'll do it anyway
As You say yourself, the specifications/standards are set by the bluetooth consortium (interest group), and nextlink is a member here too, just as Nokia, Ericsson and a lot of others.
And of course, we follow these standards, and we've got a lot of experience from doing ordinary headsets,..that sits in the ear (Invisio models).
The Bluespoon does not sit much closer to the ear, than e.g. HBH-10,15.
HBH-20 sits "in" the ear, and is actually closer to the ear, than the Bluespoon.
I've read a lot of articles as well on this subject, some say that ordinary headsets are more dangerous than the phone, some say the opposite, and it keeps going on and on,...and we could include the microwave-ovens as well,..thats been discussed a lot too.
I hope too, that someone one day, will come up with results, that we can actually trust.
Untill then, we will have to work with, what we've got,..and keep on conducting tests, to get some final proof.
Personally I use the Ericsson HBH-10. I dont get headaches/pains in any way,..at least not ones I've noticed. And I do use it quite a lot.
I guess the only thing that can give me headaches,..is when sitting for a long time, in front of a computer
Or when someone calls me, using an ordinary headset,..I sometimes get this very high "BIIIP" (pitch),...but then again I know that ordinary headsets do this sometimes.
But yes, I do know that some people get headaches and similar things, from e.g. headsets, mobile-phones, ordinary phones and especially computers.
I guess science one day will find out, what causes different things to happen,.. what "trigger" these thing and so on.
Jan
Posted by jh67
QUOTE WALLET :
Those who have been waiting for it have been waiting longer than was originally suggested as a release date. There will always be problems and often delays with new technology when it is first released, and this goes for new mobiles too.
QUOTE END.
--------------------------------
Wallet :
I know you dont want to buy the Bluespoon for different reasons,.I respect that, but I have to correct You on some things :
People havent waited longer. The release date for the first samples are Q1, and we're still in Q1.
Articles e.g. websites might have written some release-dates, but we never gave any specific release-date/month.
And no,..we dont have problems with the technology.
And progress hasnt been slowed in any way.
The problems that could be, when releasing a new product, could be many things,..e.g. delievery of different materials on time (we use some special parts because of size), production, marketing,... there're a lot of aspects in this, a lot of things to take into concideration.
And yes, things could go wrong,..but we dont count on it, and we dont think about it everyday
Jan
Posted by wallet
[quote]
On 2002-02-11 22:10, jh67 wrote:
QUOTE WALLET :
Those who have been waiting for it have been waiting longer than was originally suggested as a release date.
QUOTE END
Yeah, sorry Jan didn't mean to imply that YOU had been suggesting specific release dates - but the press and magazines certainly have. I have seen several suggested release dates.
QUOTE WALLET :
There will always be problems and often delays with new technology when it is first released, and this goes for new mobiles too.
QUOTE END.
Well, I never buy a mobile phone the day it is released for the same reason - i was talking about wireless technology in general.
Thanks for respecting my reasons for my decision not to buy the Bluespoon, Jan. This bluetooth problem is quite disappointing because I really like Swedish and Danish culture, manufacturing quality and design.
Mark / Wallet
Posted by jh67
Hi Mark
Yeah, we all know the press and magazines.
But again they dont always have the whole story,...and they like to give away prices and releases...it looks good
E.g. magazines work this way,..we all know that,..they do it for a living.
We (Nextlink) never did speak about a specific date or price,..we only gave some indications.
I know what You meant, when you said that all new products can be delayed and problems might occure. You're right
All I meant was to say, that we untill now, dont have any sort of problems.
We hope to deliever a good product,..which doesnt have "child-diseases",...and of course we hope to deliever on time !
Thats always the hard part,...because this depends a lot on the people we work with as well.
Of course I respect You for not wanting to buy it. We're all critical about stuff,..personally I woulnt want a microwave-oven, hehe,...and I dont have one.
I like to investigate things too, before throwing myself into it,...might be a bit "old-school",..ok I'm 34. But I like to know, what I'm getting into/buying, before doing it.
I quite like the scandinavian designs too, the only real problem, is prices. It always turns out very expensive,..even in the country its produced
See Ya
Jan
Posted by wallet
thanks Jan, and I know reading your posts that you always are very open about no release date. That is good.
Any more mobile phone and/or bluetooth users experiencing similar headaches etc?
Posted by doogie
I've used GSM mobiles for about six years, and for at least the last three to four years, I have experienced mobile related headaches of varying intensities. They generally start a few minutes into a call on the side where the mobile is, and creep across my head the longer the call is. I normally change ears, which means the headache then starts on the other side too....!
I have been very tempted to get a T39 to use with my iPAQ, and am very interested in the bluetooth receiver with attached earpiece/microphone, but Expansys seem to only list that accessory as compatible with the T68 and not the T39.... do you know if this is the case?
Anyway, I think that should have been in several threads.....
I've tried many phones over the years, and have so far found the best to be the Motorola Kramer based phones like the V3690 and V50. I personally put this down to the air space between the aerial and the screen, and the radiation blocking properties of the screen.... I have also seen that the SAR level on these phones are much lower than on other handsets.
The worst phones I remember using for a while were Ericsson 768 and Nokia 3210.
I have been very tempted to invest in a bluetooth enabled phone/headset, but I've been apprehensive due to the potentials of increased headaches meaning I've wasted a few hundred pounds, and potential interference with my 2.4GHz video senders.
Posted by jh67
Doogie > I work for the company Nextlink, who makes the Bluespoon,..actually I designed it
It will work on T-28 with adapter, T-39, T-68, R 520 and Nokia 6310.
And of course the other bluetooth-phones that are coming.
This you can read about here :
http://www.nextlink.to
Jan
Posted by decoy7
my first mobile was a Motorola 8500(original pre GSM Brick), best phone ever made.
it got used regular and i made more than your average users number of calls on it as i worked in the phone industry.
never had a single issue with headaches, the phone was big enough to hold with 2 hands and the aerial was probaly longer than a t68.
my last analog phone was an ericsson EH337...maybe add 1/3 to the height of the t68 and it was a fair bit thicker.
this phone for me launched ericsson in the UK market and set a standard like the NEC P3 & Motorola StarTac before it.
this was when the headaches started...my airtime use when i got the EH337 went up a little...headaches started to be more frequent and i put it down to the size of the phone being condensed with not enough materials sheilding the components from your head.
this was also the quickest phone to overheat. recently i had a faulty t28 that overheat in seconds when i put the battery on.
the metal base plate would burn your finger to touch...very dangerous.
todays GSM phones are no different, some will fry your head after prolonged use, there's also varying factors such as good reception & battery power, these can cause headaches to occur.
i haven't studied the effects a great deal just observed frommy own experience, it also counts that i clock up hours worth of airtime in the thousands each month and have done for roughly 6 years now on GSM.
at work i've worn a headset for fixed line phones for more that 10 hours a day and never experienced any similiar effects like with the mobile.
...end of trainspotting rant
Posted by wallet
hi decoy7,
your comment about the screen on the Motorola V50 and other similar designed phones is v interesting.
thought about that over the weekend, and the screen might act as a electromagnetic block for radiation from the aerial behind it - very interesting.
i have ordered the bluetooth Ericsson HBH-20 to test that - as it has the receiver around your neck instead of next to your ear.
Also, i have also just bought a new handsfree kit invented in the UK that is basically a microphone/speaker attached to a tube to conduct the sound through the air to your head. very basic idea but smart thinking by the inventor
it can be found at http://www.safetalkforlife.com
i will be reporting back with both results
Posted by Jumpinfrog
Hi, Wallet,
It is many years since I was posting on the Internet....
Well, here we go with my two cents:
I get headaches phoning with GSM's. In the past even by being in the same room with one. I used to hang an antenna out of the window (bit extreme) which did the trick (Siemens S6).
Started to feel much better with newer phones (first Nokia communicator so big that antenna was further away...). Later earpieces and actually no headaches with those (Sony Z5). Girlfriend's father, who is toxicologist and has read some "not for our eyes" research results does not let his kids phone without headset. He is not so worried about areal effect of the earpiece, but would not be surprised if it existed.
Now I use HBH-20 with NOKIA 6310i. Great combination (only in my particular specimen extremely short battery life.
At the moment in contact with Ericsson about replacement). Sound quality great. Low profile was the reason I baught this one. Did not think about harmful BT waves. Now extra happy (if they fix my battery...).
About the pains... I have used with Homeopathy as my major health care for many years (not open to debate in this forum
So I would not be surprised about BT. It would be a kind of homeopatic version of GSM and therefore much more potent. Also try not to wear on the heart... I am not a phisician or expert, so don't take these remarks too seriously, these are just my ideas...
As for the HBH-20: I have done 1.5 hrs of phoning within three hours with no headache. I have not tried HBH-15 or other "near ear" models, so I would not know about them.
The nature of the particular headaches I get from GSM is that they start with extreme neck cramps going up into the scull and causing long lasting cracking pain high up in the brain. Some people have suggested that the problem is holding head and arm in one position resulting in heck cramps and then headaches. Some people would not feel the neck cramps so would think the pain comes into the brain directly. Well, I don't know. Feels pretty weird near my ear as well anyway.
Have done so much unprotected headache phoning years ago, am not so sure if all efforts now are still worth it. Well.. let's hope so.
Posted by c96sthl
I thought Bluetooth product will consume less power ( a fact) and at the same time generate very small amount of Radiation compare to GSM mobile? Which is why it was refer to be safer.
so there shouldn't be much fear whether it is HBH-20 or HBH-15 or Bluespoon.
Posted by Cactus
The fact is that according to the specs BT devices emit 0.001W at 2.4 GHz . Normal mobile phone would emit between 1 and 2 Watts at 900/1800MHz, which is at least a thousand times more. I've been using my BT headset for a while now and have never experienced anything of what you wrote about. I guess the problem you are experiencing might be caused by an improper grip of the ear hook. There are few big nerves located in the ear erea and if one of them is continuosly irritated or compressed it might give such type of feeling. IMHO.
Best regards.
Posted by Orion
I would look into the speakers where putting out when you where using the phone. It could be giving out a highpitch sound which you are not noticing and giving you headaches. I had this with a sound system and my headsets would give me headaches, had a friend look into it and there was continous highpitch sound coming out which I had not noticed.
I dont think that the radiation output of the phone itself could have caused the headache. Also see if the person you tend to talk to gives you headaches as well
It does for me when I get telemarketers.
Posted by jh67
Ordinary wired headsets can give these "high-pitch" sounds, ..Bluetooth-headsets dont.
The "ear-hanger" can give problems/headaches,..because it sits on some big nerves/nervesystem on the backside of the ear.
That is not the case with Bluespoon,..its ear-lock sits IN the ear,..and NOT around it
And I would say its pretty safe to use all bluetooth headsets,..none are worse/better than the other.
We all work under certain/specific guidelines/laws concerning radiation, and they are being followed,..all of them
I still believe, when talking e.g. cancer,..that some will always get cancer,..no matter what. It just has to be "triggered" by something, whether its cigarettes or radiation or something else.
A very good example is the cigarettes,..some develop cancer,..others dont,..they can smoke their entire life,..without being bothered by it at all.
What I'm trying to say is,..that "someone" will always get sick, while the rest (98,56740%) don't.
Jan
Jan
Posted by Scooter1me
has anyone ever held there cell phone near a radio or speaker when its ringing or engaged in a call ? It sounds like a buzz saw - thats the sound of microwaves hitting the magnet of the speaker - same thing the cell phone microwaves do to our brains....scares the living day lights out of me - I've been using cell phones since 1983. My eyesight has started to go - more in my right eye than left (I talk on my phone against my right ear - coincidence ? ) I get headaches - painful ones now whenever I speak for any prolonged period on my cell - with or without my earpiece ( I have a Nokia 6310i and Ericsson t68 - they both cause the headacheds). My regular land line phone - and cordless phone do not make my speakers buzz - neither does normal sun light or putting radiated food in my mouth. I am a baby boomer - they also told my mother it was ok for her to smoke when she was pregnant with me in the 50's. People do anything to make money - need I say more...?
Posted by agdam
I came found this thread through a search to look for similar observations -- simply 'coz I am in fact experiencing a more noticeable headache after more than 5 minutes or so of use of my new HBH-30 and it does appear to linger around a while after use. I have had similar headaches years back when using early generations of Ericsson phones (the ph series), tho my T39m rarely gives me with any headache these days, even with long use (except when the bill comes along.)
I not sure if its just coincidental, whether its the radio radiation or simply that the ear piece being held against the back of my ear that lead to the headache (the ear hook of the HBH-30 is indeed larger than previous models, albeit softer due to the rubber material used.)
That's my 2 cents of an experience...
Posted by floke
Hi, I've never experienced headaches while using mobiles but on the other hand I seldom speak more than a couple of hours per week.
I find this discussion very intresting and I remember having read an article some years ago where peple that had headaches with mobiles had put them in airtight plastic bags and then got rid of their problems!! I'm not joking!
It turned out that the plastic shells of the phones emitted very toxic substances when they were heated by the bodytemperature and electronics inside. The phones in the article where from Ericsson and Nokia I believe. Since then I haven't heard anything more about so i suppose that the plastic materials are "healthier" nowadays. However, it would be easy to try for someone who gfets headaches.
But like I said, I'm lucky not to get them and have now bought a HBH-20 just in case
Posted by Bhaal
I think you can assume for certain that it is not the Bluetooth radiation that produces the effects, if you have a mobile (or even just wireless) phone that does not produce the results.
However pressing against the head could perhaps do it. There are some major nerves passing close by there.
Also the plastic evaporating something sounds more probable than the BT radiation irritating you.
It could even be that this happened more during calls, because during calls parts of the plastic might be heated by the antenna and electronics.
However, I think you should also consider that it is possible that your worrying about this effect, might be enough to cause headaches...
Posted by ommadawn
One of the most interesting, and still very actual, thread around here...
guys!!!, let's give this one back to life, shall we?
Posted by nyback
I am a long time heavy gsm addict. I am selfemployed and talk a lot with customers on the phone during my workdays. I bought the first ericsson bluetooth headset when it came out so i have also been using bluetooth for quite some time. I would not have payed so much attention or concern about these talks about the dangers with mobiles if not for one experience that i had a few years ago. I cant remember what phone i had at that time.
I had been experiencing some toothpain for some days and i had ordered a time with my dentist to go and check it up. This was 'normal' tooth problems that had nothing to do with my mobile. Then one of these days (before i had went to see my dentist) i was sitting at a restaurant talking to a customer. The conversation lasted for some time. After maybe 40 minutes of talking my tooth that had been causing me moderate pain started to hurt more. I was concentrated on my conversation on the phone and did not give it any attention. After talking some more minutes the pain continued to increase. Suddenly i realised that my tooth was hurting a LOT. I had to put down the phone in the middle of a sentence and give out a cry of pain. (not to loud, i was in a restaurant) emediately the pain vanished. I still did not connect the pain to that i was using the phone. I picked up the phone again to give an excuse to the customer for my behaviour. Maybe 20-30 seconds after i put the phone back to my ear (same side as the tooth) the pain started to increase again. I tried the same thing a couple of times (put down the phone and then picked it up to my ear again. Same thing every time. The pain started to increase again while i was talking on he phone. This is the only time i have felt anything from my phone but its enough to convince me fully that there may be risks with these things that we should be carefull with how we use our dear mobiles.
I feel more safe when using bluetooth because of the lower transmission power that is used. It must make some difference if you transmit with power for reaching 2 kilometers or 10 meters i guess.