How to find out if sim card is defective

[Ishan Ghimire]

Due to some personal reasons, I was unable to use my phone for a couple of days, during which it had completely drained. After booting my phone back up, I noticed that I wasn't getting cellular service, at first I thought that my phone was broken, but I learned that this wasn't the case after inserting my sim in another phone.

How can I confirm if my sim is actually defective, any tests perhaps. And if it is broken, is it possible to recover my sim card

 

[mikedt]

If you suspect your SIM is broken, and you've already tried it in another phone, which does confirm it. You'll need to get it replaced by your carrier. SIM cards can go faulty.

Are you sure your account isn't just out of credit or minutes, or is overdue?

 

[svim]

This sounds like there's just some glitch brought on by losing power (i.e. not a proper shutdown where all active services, even in the background, get a shutdown command). If you go into your Settings menu and look into your cellular service, check if there's any option to re-establish your cellular account -- its location will vary depending on your phone model and carrier. If that doesn't work out, also buried somewhere in your Settings menu will be a 'Network settings reset' option. If you do a Network reset note that this will wipe any network related settings back to their defaults so along with resetting your cellular service settings it will also be wiping any saved WiFi networks and saved Bluetooth pairings.