Originally Posted by delmarco
I don't know about AT&T data plan.
But T-Mobile's Curve doesn't need to check for new POP mail every 15 minutes, because it gets sent right to the phone.
^^THIS information is absolutley incorrect. ALL carriers' BIS polls for new mail every 15 minutes. When mail is present, it will poll again in 2 minutes, and revert back to the 15 min cycle if nothing is present. Tmobile and AT&T and Verizon, etc., all do it the same way. It is a function of RIM, not the carrier.
The exception to that is Yahoo, GMail, and your own @carrier.blackberry.net address. Those three are pushed instantly.