Samsung galaxy mega i527 mobile network problems

[Android Central Question]

My phone was working fine one minute, and the next thing I know I have no signal/service. I didn't change anything and have no idea as to why it's having this problem. I've tried to reset it, but it didn't help. Please help.

 

[B. Diddy]

Welcome to Android Central! Have you asked your carrier about this? They might want to try a replacement SIM card.