What does TomTom say:
- No GPS device
- Waiting for a valid GPS signal
If 1 then it's not seeing the GPS itself, if 2 then patience is the order of the day.
You might like to do a search and install GPSTest, this will scan all COM ports and then connect to your GPS chip and then tell you what settings it is using. Also i have had mixed results using Q-GPS to speed up the time taken to get a fix.
FYI, mine is on COM9, 9600 baud, using "Built-in GS receiver"
Sony Xperia S
ROM Stock UK unbranded 1257-3921-R5E
HTC HD Mini
ROM - Stock Vodafone UK
ROM - Stock O2
ROM - TNYYNT 016BSN
Radio - 1.50.08.11