network problem in lumia phone 520

[WPCentral Question]

my phone lumia 520 is stuck on airplane mode , it never connects to the sim card network and i cant call or do anything , what should i do ?

 

[Teo Bartulovic]

It happened just like that or!?!? Damaged or expired SIM or something like that? Have you tried to put another one? If nothing else helps you should try to hard reset your phone just to be sure is it software or hardware issue...