My software is 10.0.10.90, and mine is the latest software, it was updated on Monday..
Maybe it's not available via T-Mobile UK yet.
contact your service provider. get a new sim card. i had the same problem with my q10
Yes I am in good coverage. Yes it happens for every call that is to a contact that I select. If I dial the number it connects right away. I do not believe there are delays on incoming calls.