Method 1 - ALL Carriers (Desktop Manager 5 works, not sure about 6)
Requirement #1 you need an unlocked 9800.
Note: 3g will not work on t-mobile, you can enable UMA after this procedure though.
This method requires that you already have a blackberry on your particular carrier. (or access to one).
1.
Switch your SIM into your old device, Register on the network and push your servicebooks to ensure you have the latest (I used a T-Mobile 9700)
(THIS IS CRITICAL, make sure the SIM is in your old phone. You will not have the necessary Browserconfig SB if you skip this step and therefore still won't be able to surf the web. Do not skip this even if it seems pointless, activate your old blackberry!. Some people skipped it and wondered why the process didn't work...)
2. Go into options, advanced, servicebooks - HOLD THE ALT KEY and type SBEB. This will enable Legacy servicebook restore mode which allows you to backup/restore ALL of your servicebooks (Not just the ones RIM allows you to backup).
3. In Desktop Manager, plug in your 9700 (or whatever you used), go to backup-restore/advanced, on the right hand side select the servicebooks on your 9700 and press the "Left Arrow" to copy them to your PC. On the left hand side highlight the newly copied servicebooks, click file/save and name them something, 9800Servicebook for example, and save the file to the desktop. You've just made a COMPLETE BACKUP of your carriers servicebooks.
4.
Switch your SIM back into the 9800, go to options/servicebooks, HOLD THE ALT KEY and type SBEB to enable Legacy SB restore mode.
5. Plug the 9800 into DM and restore the servicebooks that you just created using backup-restore/advanced.
6. Rebewt and bob's ur uncle, working for all carriers. (if MMS is still tiny, it's bc the 9800 isn't identified on the network as a supported device).
IF YOU DECIDE TO MAKE YOUR SERVICEBOOK FILE PUBLIC FOR OTHER USERS, MAKE SURE YOU DELETE YOUR PERSONAL EMAIL SERVICEBOOKS BEFORE YOU MAKE THE BACKUP.
Thanks to "duck383" for these Desktop Manager 6 instructions. To get the service books using Desktop Manager 6 (Enable Legacy Servicebook Restore Mode first, alt+SBEB)
1). load DM
2). on left side select DEVICE
3). Device Options
4). Select Custom, select Service Books
Desktop Manager will save SB"s to the same folder as the directory folder selected when backing up phone and thats all there is to it
**DM-6 note**
After saving the service books be sure to do the reverse and set the selection back to FULL (or your selection) instead of custom or next time you do a backup it may not save correctly as it may still be set to SB's only
If you choose to then enable UMA
http://forums.crackberry.com/f209/gu...mobile-513720/
If you don't have a blackberry on your carrier you'll have to find the servicebooks for yourself. There's a thread in the 9530 forum that has a link to generic t-mobile servicebooks.