Info:
This info was compiled by numerous sources from across the web. It was my goal to
simplify the instructions to help AT&T users download, install, and use Yahoo Instant Messenger 2.0
RIM's Yahoo Messenger requires a specific service book "BBFS2 [YHO]" and AT&T (Cingular) does not provide that service book. Their goal is to get users to download the OZ IM application from MediaNet because it uses text instead of data.
If your phone is unlocked, you can insert a T-Mobile SIM and download/install Yahoo IM. At that point, you should check your service books to make sure you have "BBFS2 [YHO]" listed and then switch back to your SIM. If your phone is locked, continue reading.
Instructions:
THIS DOES NOT WORK FOR MAC USERS
PLEASE BACKUP YOUR DEVICE. DESKTOP MANAGER IS VERY EASY TO FOLLOW FOR BACKING UP AND RESTORING!
- Download the Yahoo Messenger 2.0 service book (NOT THE APPLICATION) from
HERE
- Open Desktop Manager and restore it to your device.
- Manually register your handset with the RIM network via the HRT editor:
Options > Advanced Options > Host Routing Tables > Menu > Register Now
- Load your own backup back to the device.
- Log into your BIS account (the same thing you did when you first set up your BB people!) and re-send service books
- Download Yahoo Messenger from mobile.blackberry.com
* If applicable, regenerate encryption keys for Desktop Manager or BES. If you're on a BES, again, make sure your BES admin can create a policy allowing Yahoo IM traffic.
** If the service does not work right from the install, try doing a hard reset (pulling/reinserting battery).