Why my nexus 5 phone all of a sudden has no service?

[tazevedo]

Why my phone all of a sudden has no service even though my account is in good stand?
My phone nexus 5 last week stopped working, when I tried to send a message it says "DATA NETWORK UNAVAILABLE" I could`t make a call either it said: "NO SERVICE" I called my provider which help me troubleshoot the device with no luck. Later that day I stopped at one of the stores they changed my sim card again no luck, so I decide to call google support they help me troubleshoot but they could`t figure out what was happening. After I exhausted everything I decided to restore the the phone to the factory settings I had hope that would help (that was one of the things suggested by google support) but again it did`t help. Can anybody help me? My phone is a NEXUS 5 and the android version 5.1 and it`s about 16 months old.
Thank you

 

[LeoRex]

If both your carrier store and Google can't figure out what is wrong with your phone and the phone radio issue persists even after a factory reset...

Open settings, go to About Phone, select Status and then look at the IMEI Information screen. If you have a number there, then in all likelihood, the actual phone radio is fried. If the IMEI number is blank, or unknown... anything other than a 15 or digit number, then your EFS partition might be corrupted...

Either way, there's no easy fix and you would most likely have to have your phone serviced or replaced.