I used to say "our favourite telco" as a euphemism for BT :-)
We had a really good meeting with another telco today, and it was really nice to be able to talk to competent technical people, and commercial people and have a good and productive conversation to further business for both of us. We even had some good surprises with some of their technical suggestions.
The good news is we hope to have roaming SIMs next month, and we are expecting several of the minor technical niggles to be tidied up.
Update: Yes, I am using a roaming SIM that roams to other UK networks when no O2 coverage now. Testing. We should get tariffing next month.