3G&4G doesn't work on iPhone 5S
My iPhone 5S was working great but from 3days cant work on 4G&3G only EDGE (E).. I tried all simple solution rest network and restore the iPhone nothing change.. One of my friends suggest maybe the IC what i can do with my device .. And i live in SA and no apple shop over there should i send it to any apple shop because its under warranty..
Pls advise me
Thanks
iPhone 5s, iOS 7.1