No Sim

[Anonymous]

Please help my I phone 4s keeps displaying a no sim error message. Last week it said invalid sim but turning off and on fixed it. Now I can't make calls or text and I have done nothing different to my phone!

[Cleoriff]

Hi @Anonymous

Try taking the sim out and cleaning it gently. Put it back in and reboot the phone. See if that helps?

If not it may well be you need a new sim. You could pick one up from your local O2 store...

[Anonymous · Accepted solution]

Sounds like a faulty sim.

Pop into your local store & pick up a sim, ask them to do a sim swap for you which will transfer your number & tariff

[MI5]

Either a faulty sim or faulty sum card reader in the phone.

[jonsie]

Easiest option is to change sim at your O2 store. If you still get problems have Apple run diagnostics.