Updating sim card
On Allow Restrictions, look for cellular data and tick “don’t allow changes”.
If you have any other problems or solutions about No SIM card issue, do let us via comment.
If you're in the Express Post network, you'll receive your sim card the next business day after we ship it. Put 3 small pieces of scotch tape on the top ( side without the metal contacts) of the SIM card. Then place it back in the tray and put it back in the i Phone. Solution 6:- Insert your SIM card in any other phone. If it have any issue, take it to your mobile service provider like AT&T. There’s a Standard SIM, a smaller Micro SIM and an even smaller Nano SIM.We know how important reliability is to you, so we've made huge changes to ensure you get the best quality cell service available.