Rispondi a "Whysays "insert sim card" despite ensuring sim card is placed properly"Check and replace SIM IC.
Rispondi a "camera not working"For the first, flash your phone. If there will be no result, it's a hardware problem - start with changing camera module.
Rispondi a ""contact service" problem in Nokia 5130Xpress music"SUPERDONGLE or SIMLOCK area problem. You need to calculate RPL for your phone (not for free) and flash it with one of boxes (mx-key for example).