It has be recently describing me I have to unlock the phone to use it, even when I never set a lock password contained by the first place. It just on a whim decides to cause me put an unlock code. I usually just turn it past its sell-by date and turn it back on to go and get regular access back. It also tell me my sim registration failed and/or to put my sim card contained by, and it IS in. Overall it is freshly acting up and I think the phone may be dying. I hold had it for for a time over a year. Are these problems common or are they signs of the phone dying?
Answers:
It can be 1 of 2 things, the phone or the sim card. I would guess that your sim card is on the blink. Since your phone is out of warranty (not unless you have insurence) appointment support, tell them your sim card is defective and enjoy them send you a replacement, they might even convey you to a local corporate store to have it replaced (free of charge) Once you replace the sim, your troubles "should" be solved. On the slight unpredictability its not the sim, then I would basically purchase a new phone from ebay
Cheers