Not registered on network

[JamesUK]

I have a Galaxy S5 mini, it has been working fine for months, then I couldn't make and receive calls. it showed several bars of service, but wasn't connected. If I tried to make a call it said 'Not registered on network'

I found one way of making it 'work' was switching to 2G only then it makes and receives calls however data is then limited to 2G, not ideal.

I am on giffgaff network in UK. SIM worked ok in a different phone and connected straight away, so assume it must be a phone problem. Tried factory reset. Tried selecting O2 settings instead of giffgaff. Maybe a hardware issue?

Attached is a screenshot showing several parameters from the Service Mode screen, does that shed any light?

Any help appreciated!

 

[ocnbrze]

if a factory reset did not work, i see two options for you:
1. take it in to your carrier and see what they say
2. buy a new device. your device came out in 2014 regardless of when you actually obtained it. that is pretty old, i'm surprised that it has lasted this long.