Datastar,
With GO 920 (No T) like yours, I was able to connect and Use Tom Traffic Plus Service with a NON Tom Tom Listed Blackberry 8800 (
http://www.phonearena.com/htmls/RIM-BlackBerry-phones-m_30.html)
I have the GO920 as well and after countless tries I?ve been able to connect and Set Sup Tom Tom Traffic Plus Service (still requires Tom Tom Traffic Subscription from your Tom Tom Home) with my AT&T Blackberry 8800.
The Problem with Tom Tom Plus Server Connection ?not going beyond 60% completion? can be resolved as follows (please note the only difference between your phone and mine is the make?.I think every thing else is same):
1. When prompted to select Phone => I select the only available Blackberry 8100 under AT&T provider.
2. Next screen returned with same list of available phones (I selected Blackberry 8100 again). Please note I use blackberry here because I have BB8800 which might differ for you...
3. Next screen prompted me for country => I selected USA.
4. Next screen prompted for Service Provider (such like T-Mobile AT&T or Cingular) => I selected ?Cingular with MediaWorks or something like that? option toward end of provider list and I got 100% completion on the data connection.
5. Validation Test:
a. Go to GO 920 Main Menu page 3 of 3 and select ?Tom Tom Plus Services? which take you to ?Tom Tom Plus Services Menu Page?
b. Select either ?Tom Tom Weather? (page 1 of 2) OR ?Download QuickGPSfix? (page 2 of 2). [I believe that these 2 options are Free Non Plus Service with GO 920].
c. If connection to ?Download QuickGPSfix? OR ?Tom Tom Weather? completed successfully in 60 to 90 seconds or less the your Plus Setup & connection to Tom Tom Plus Service Server with your Phone data plan is successful
6. This Test validate your connection is using your phone data plan to connect to Tom Tom Plus Service Server.
7. Now if you don?t already have a Tom Tom Traffic Plus Service Subscription you can not activate one from your Tom Tom Home ( I ensured that it works before paying for Traffic in Euro NOT USD)
This completes the setup for me; at least I?ve done this about 3 times now. Please note that Tom Tom Support folks will not help you and they will say your phone is not in the list of compatible AT & T phones (at least that was what I was told today).
Please be warned that sometime you might have to go through the Tom Tom Plus Server connection setup once in a while.
Why? I don?t know, all I can say is My GO 920 is from Costco.com during Thanksgiving deal and my Blackberry 8800 is not in a Tom Tom compatible AT&T phone list?
Sorry for the lengthy instructions, I hope you find this to be very helpful and good luck with your Traffic Plus setup.
Take care
soderinde