Since I returned from holiday my phone has had no service, even though my sim card works. I have tried manual setting my network and completed a master reset and my phone still say no service?
ive been told its the mother board and it just won't work?
I don;t get how all of a sudden it can work on holiday then when I return to the UK and switch it off flight mode it says no service?
iPhone 4, iOS 7.1.2
Did you use another local carrier SIM while gone? If not, I'm not sure what you are referring to when you say master reset. What did you do when you say you did that? Have you done any other troubleshooting? After figuring out what this master reset is, then we can try other troubleshooting steps. Who told you this was a motherboard issue?
Have you gone through this?
Read: If you can't connect to a cellular network or cellular data - Apple Support
no service on my iphone 4
