I use to be able to roam onto T-Mobile (EE) or Vodaphone when visiting the UK. This gave the best roaming experience as T-Mobile UK/EE offered LTE. But for a week now, I can only roam onto O2-UK (Telefonica) or 3UK (Hutchinson) which are very slow 3G (O2 has 4G, but the roaming agreement does not allow it).
Can T-Mobile confirm whether this is a technical issue or have the roaming agreements changed? We have this issue on many phones and on my personal line as well. We have over 100 lines with T-Mobile and spend over $20k per month!
Best answer by tmo_marissa
You can reach us while roaming internationally by following these instructions. A tech support team can review the roaming partners in the area of the UK where you're located and if necessary, file a ticket so that engineering can report back with insight on whether this is a temporary change due to an outage with the roaming partner or a long term shift in roaming agreements. We definitely want to get you all the info we can!