Hey guys, sorry to open a new thread. This problem is quite rare, and I think its worth looking at.

Does your iphone suddenly jumps from phone already activated state to suddenly sim locked, then i have to type in the sim pin again to use the phone. This is weird, because its completely random, and I doubt it is because of low signal, the signal is full bar.

Hmm my sim pin option is set to On. But it should only ask me for sim pin only when i turn off and on back my iphone right?

Oh I see.. haha I thought it only ask when I restart iphone. Thanks alot.