The phone you want is this one.

BLACKBERRY CURVE
1. Leave existing sim in the Treo DO NOT REMOVE IT not even to look at at. Its jammed in tight!
2. Deactivate that sim and activate a new sim and transfer the number to the Blackberry Curve.
3. Make sure the case you have for the Treo will work or else buy one for the Blackberry..
4. Add the Blackberry service plan described on the bottom to your existing calling plan.
5.OPTIONAL ITEMS: DOCK & SPARE BATTERY.. If they don't have this dock don't buy an extra battery because this dock lets you charge the phone and the spare battery at the same time.
IMPORTANT: DON'T BUY OR USE BLUETOOTH DEVICES UNLESS YOU GET THE SPARE BATTERY AND THE DOCK. THESE DEVICES DRAIN THE BATTERY.. DISABLE THE BLUETOOTH TILL YOU GET BACK.
SERVICE PLAN BELOW SHOULD BE A 19.99 ADD ON.
BlackBerry Internet Service Plans
Integrate up to 10 of your existing e-mail accounts and have your messages pushed right to your BlackBerry handheld. Choose a data-only plan with unlimited e-mail and Web browsing.| Plan name | Whenever Minutes | Data per month | E-mail per month | ||
|---|---|---|---|---|---|
| BlackBerry Unlimited | None | Unlimited | Unlimited | ||