Same issue! Reset Network Removed and place SIM card Default Reset Turn on/off phone like 5 times a day now! And I have a Network Extender and guess what....got nada! Still no service, once you place a call, call fails and you have to wait until the phone decides to add the reception to then place the call. Just imagine if you were in an accident or have to place an emergency call?! Phone is like nope, I chose when to place the call. Not cool Apple! Not cool!