O2

After troubleshooting with O2 and Samsung - my phone had randomly dropped off the O2 Network one day- I was sent a new SIM by o2 which was activated over the phone.When I received it I inserted it into my phone and then turned the phone on.I'm still ...

This is a query for the number I have to my Samsung J5.Phone was working absolutely fine yesterday and then, around lunchtime, dropped off the network completely. I have a little circle in the top right side of the phone, no bars and no 4G indicators...