Back in January this bug was closed with Andre believing that Nokia was going to update their SUPL server to include T-Mobile USA data:
https://bugs.maemo.org/show_bug.cgi?id=7057

But 8 months later it is still completely useless. Location-based services on N900 are mostly impossible to use unless you are standing outdoors for 5 minutes and can get a real GPS lock. It's frustrating when people with other brand of phones can get A-GPS lock in a matter of seconds.

The old posts about this told us to use Google's SUPL server instead, which indeed worked for some time but no longer seems to be working for many people, including me... I also tried lbs.geo.t-mobile.com which may not even be a SUPL server, but I found it while Googling and thought I'd give it a go. No luck.

I am curious: Does anyone here own a T-Mobile (USA) branded Nokia GPS-enabled phone, and if so 1) does A-GPS work for you? and 2) what SUPL server is it using if it works?