I just recently receive my iphone 4s in mail last week. Its been working fine until this morning where its been working on and off with texting and receiving texting, calling and receiving calling, notifications, basically everything.Then it just stop when there was nothing. Theres no error code. When I try make calls you hear nothing. When people call me it goes straight to voicemail. I need help because very soon I will end up throwing phone too wall.