Static with Treo on T-Mobile

I'm curious if anyone else using a Treo 600 on T-mobile has had unacceptable levels of static while on the phone.

I tried a different Treo. Got a new SIM card. Roamed around the state. The static happens everywhere, indoors, outdoors etc. They say they're working on some cell tower problems but I doubt this is the issue since it started weeks before their "work" began.

Finally yesterday probably out of ideas of what it could be a rep agreed it may be that they don't support the Treo anymore (or as he put it, maybe we dropped support because of the Treo problems).

Have you had this?