on 18-10-2018 13:05
@JaneyEllen It should be automatic although we do know of some people who have arrived abroad and had no service, so it's always advisable to call and check before leaving home.
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 18-10-2018 15:46
Always best to check before you go rather than the stress of getting it sorted after you travel.