I've just got an A780 on T-Mobile and I'm having problems with no GPS signal in the north London area. On a trip from Essex to Enfield on the M25 I lost signal from the M11 onwards, and further trips to Harlow and Edmonton again left the "determining current position" message displayed until I started to make my way back. As the GPS reciever is built into the phone I am veering towards this being the problem rather than Copilot. At the moment both Motorola and ALK (the maker of Copilot) are blaming each other. Does anyone know if this is a phone problem and if I exchange the handset will I just end up in the same position as now? Thanks, JC.