[109g10]

I have a Telus 7290 and an At&T 7280. I'm with AT&T. I'd like to use the Telus blackberry with my account. Telus is CDMA. Can I make the Telus BB GSM by replacing parts with the 7280?

[NJBlackBerry]

No.
It won't work. You will end up with two broken BlackBerrys.

Both the 7290 and the 7280 are GSM. The 7250 is a CDMA model.