I bought a new iphone 5s on Sept 2nd. My texting and phone calls worked fine until I updated to iOS 10. Ever since then, every few hours it seems that the network freezes(it will stay stuck on 1 bar even if I am in an area where I should have full) and I cannot send a msg no matter where I go. Once I put on airplane mode for a second and then shut it off, I am able to receive and send again. But it is only a temporary solution. Has anyone else had this issue since the update, and is there any way to permanently fix the issue? Apple says my phone is totally fine even though this started immediatley after I updates.