My Blackberry 8310 is on a corporate BES. I had been having trouble getting the tomtom 720 to even see that dial up networking was possible. I after many google searches I realized it was the IT policy on my BES that was preventing DUN from working. I spoke with IT (at my company) and got them to flip on the tethering option for my BB. T-mobile does not have a tethering specific plan (AT&T does), but I have the unlimited data plan. I then used the following settings on the tomtom:
APN: wap.voicestream.com
at+cgdcont=1,"IP","wap.voicestream.com"
username:<your phone number>
password:<your password>
If you don't know your password, go to www.t-mobile.com and either register for an account or click the forgot password link. Many other sites list this as being guest/guest or to leave them blank, but that never worked for me.
To find out if your Blackberry has the correct setting in the BES, do the following:
1) Go to the Options page
2) Click Bluetooth
3) Bring up the menu (button to the left of the trackball)
4) Click options
5) Look for "Dial-Up Networking"
If you do not see Dial-up Networking, then this will not work.
Hope this helps someone.
APN: wap.voicestream.com
at+cgdcont=1,"IP","wap.voicestream.com"
username:<your phone number>
password:<your password>
If you don't know your password, go to www.t-mobile.com and either register for an account or click the forgot password link. Many other sites list this as being guest/guest or to leave them blank, but that never worked for me.
To find out if your Blackberry has the correct setting in the BES, do the following:
1) Go to the Options page
2) Click Bluetooth
3) Bring up the menu (button to the left of the trackball)
4) Click options
5) Look for "Dial-Up Networking"
If you do not see Dial-up Networking, then this will not work.
Hope this helps someone.