Here is a step by step on using the program BBSAK to wipe (uninstall) the OS off your phone. I love using this program due to the simplistic and user friendly user interface.
Before you start to use this program you will need three things installed on your PC, in order for this program to work properly.
1- Net Framework 2.0 or higher, you can download it Here
2- Desktop Manager (any version is fine)
3- BBSAK program, you can download it Here
**Before wiping your phone be sure to back up your device memory through Desktop Managers back up/restore function, and your 3rd party apps. For a step by step on how to back up your 3rd party apps click Here***
Run BBSAK, if you use a password on your BB then enter it here and select OK, if not just leave it blank and select OK.
The next screen to pop up gives you list of options that you can perform with BBSAK. **Notice it will display your pin number if your connected properly**. For the purpose of this walk through we will want to select the "wipe device" option.
Once you have selected wipe device you will get a screen asking if you are sure you want to do this. **this is a good time to select no if you forgot to back up your data** If you are ready to go then click yes
You will now see a bar on the bottom of the options screen. Showing you the progress of the wipe, and then completed.
Once it is done your phone will reboot and come up with an "error reload software 507" screen. Don't panic that is what we want.
Now if you have the new OS installed on your PC you can select the "load os" button on BBSAK to load it on your phone. BBSAK will automatically delete the vendor file so you don't have to. If you don't have the OS installed on your pc now is the time to do so. Now if you want to use Shrink A OS you can close BBSAK and select your options in shrink, then click the "launch loader" button from inside that program.
Hope this helps some of you that may have questions
**Updated 7/28/09** Thanks for the walk through Sunkast
Backing up third party applications with BBSAK
- Connect your phone to your computer
- Start BBSAK and enter your password if applicable
- Press the button labeled Backup Apps
- You will see a dialog box pop up saying your BlackBerry screen may flash during Backup.
- Now just sit back and wait for BBSAK to back up your third party apps.
- When completed you will see a dialog box saying 3rd Party Apps Backup Complete!
If you look in the same folder that BBSAK is installed in (C:\Program Files\BBSAK or C:\Program Files (x86)\BBSAK for 64bit systems), you should see a new folder labeled Backup.
And inside are all of the COD files for your third party applications.