Originally Posted by Thine Wonk:
“Any users that do access the network in Ireland because they live very close to the border will get an SMS telling them that they are roaming with the rates etc, so it should be obvious.”
This doesn't always happen, particularly in places where it's common to easily roam from a UK network to an IRL network within short distances and vice versa. Depending on the network they will send a roaming SMS message and won't repeat sending the message again until (a) the subscriber is back either on the home network or on another roaming network in another country or where roaming charges are different, and (b) a minimum amount of time has passed since the last roaming SMS message was sent by the home network. In my experience the home network will not send out more than one roaming SMS message for at least 24 hours.
Enforcing the phone to manual selection only can help most users, but this is complicated by some phones being a PITA where if manual selection is enabled and network coverage is lost on the last available manual network selection the phone will not attempt to fully register back on to that network unless another manual network selection is made.
