what is a sim mep lock?

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Posted by tk338
I have a panasonic G50, and everytime I try to turn it on, it says sim mep lock, and wont let me access much, only games, alarm and time. yes it is quite an old phone, but any ideas as to how to get it working again?

Posted by Berry
MEP Lock is the Network Lock.

To unlock certain phones you will require a digit code (MEP Code) and once inputted - it should remove Network Locks...

Posted by tk338
Any idea what it would be for the panasonic?