network selection

[Anonymous]

Hello all, can anyone advise how to stop the phone automatically selecting another
Network please. I live in northern Ireland, close to the border and it has occasionally picked up O2 IRL. I have an S4, thanks in advance.

[Anonymous]

@gemz4the1 in Samsung there is an option to roam (or not as the case may be) for data but there is no option for calls.

If memory serves me rightly, can't o2 turn off international calling in your mobile account?

[Anonymous]

MI5 - I can't remember how I had previously selected the the networks, I shall change it manually now and see if it happens again.  Hopefully you're right, thanks! 

If it happens again I shall go the blocking route with O2, cheers guys. 

[MI5]

You have to select "Manual" then it will search (sometimes for a while) and come up with a list.
If you choose O2-UK from this list it "Should" always stay on O2-UK......