I’m spending some time in the UK and have my FP2 with an Italian 3 sim card with me. I’d like to access 3UK network as I get a very good roaming offer by them. Unfortunately, it seems I can’t access their network. If I manually look for 3UK and select it, I get the “registered on network” message but the phone picks MR0MME01 automatically and there is no way to change that.
I know it. I have that too. 3 UK has currently some problems and due to that stands now MR0MME01. That will only stand until they repaired everything. So everything is still like before, no worries.