Saving files before updating firmware

Posted by Aled
If i get my t610 updated to a newer firmware, which files will remain and which will be lost after the update?ContactsMy picturesCalenderTasksSoundsGames and moreOther gamesThemesEmail settings etc.

Posted by Aled
Nobody knows? Surely someone here has updated the firmware on their phone.

Posted by masseur
with all the T610 upgrades I did, I never lost a thing so I should not be worried about that