SIM card errors in mobile devices may occur due to many factors involving software and hardware components. Among the underlying causes are network problems, account-related issues, errant apps, ...

Are you trying to switch phones or carriers? You might need to swap SIM cards for that, and we can understand how confusing this process can be if you haven’t done it before. Today we’ll show you ...

Today’s troubleshooting article addresses an issue on Galaxy J7 not detecting a SIM card on one of its slots. If you have a Dual SIM Galaxy J7 that can’t seem to recognize a SIM, this post might help.