https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875809#M136688 <P>Easiest option is to change sim at your O2 store. If you still get problems have Apple run diagnostics.&nbsp;</P> Thu, 07 May 2015 05:09:30 GMT jonsie 2015-05-07T05:09:30Z https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875737#M136681 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! Wed, 06 May 2015 19:41:08 GMT https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875737#M136681 Anonymous 2015-05-06T19:41:08Z https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875742#M136682 <P>Hi @Anonymous</P><P>Try taking the sim out and cleaning it gently. Put it back in and reboot the phone. See if that helps?</P><P>If not it may well be you need a new sim. You could pick one up from your local O2 store...</P> Wed, 06 May 2015 19:54:36 GMT https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875742#M136682 Cleoriff 2015-05-06T19:54:36Z https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875749#M136683 Sounds like a faulty sim.<BR /><BR />Pop into your local store &amp; pick up a sim, ask them to do a sim swap for you which will transfer your number &amp; tariff Wed, 06 May 2015 20:04:44 GMT https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875749#M136683 Anonymous 2015-05-06T20:04:44Z https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875805#M136687 Either a faulty sim or faulty sum card reader in the phone. Wed, 06 May 2015 23:58:40 GMT https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875805#M136687 MI5 2015-05-06T23:58:40Z https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875809#M136688 <P>Easiest option is to change sim at your O2 store. If you still get problems have Apple run diagnostics.&nbsp;</P> Thu, 07 May 2015 05:09:30 GMT https://community.o2.co.uk/t5/Apple/No-Sim/m-p/875809#M136688 jonsie 2015-05-07T05:09:30Z