How to downgrade BBM on my BlackBerry Curve 9360 from version 8 back to version 6?
I have upgraded to the latest bbm on my 9360 but am experiencing lots of problems and want to downgrade
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If you have already upgraded your BBM and would like to downgrade, follow these steps below.
1. Press Your Blackberry button to go to Menu
2. Select Applications in your Menu
3. Run Blackberry Protect and backup your contacts
4. After backup is complete, go back to Menu
5. Select 'Options'
6. Select 'Device' inside Options
7. Select 'Application Management' inside Device
8. Scroll to Blackberry Messenger and delete it
9 After deleting is complete, it will ask you to restart your phone, let it restart'
10. After your phone restarts, just type 'about' at the home screen of your phone and some icons will pop-up (Browser History, Social Feeds, Facebook, Options, Help etc)
11. Select Options and Click 'About Device Versions' to see your Blackberry OS version
You will see an option that looks like this...
Blackberry (R) 9900
smartphone (3G, CDMA, Wi-Fi)
7.1 Bundle 921 (v7.1.0.267, platform 5.1.0.230)
12. After taking note of your OS version
13. Make sure your phone Network is on 3G (for fast download ) and Download the corresponding Blackberry Messenger according to your OS from the list below...
To download Blackberry Messenger For OS 6.0, click here.
14. After Clicking on any of the links above, a new page will appear, wait for the page to load completely, lets say 10 seconds.
15. After the page loads completely, scroll to the top right side of the page and click 'SKIP AD'
16. Download and Blackberry Messenger that will pop up, then RUN IT. This usually takes time to complete but if its taking so much time lets say more than 30 minutes, remove your phone's battery and put it back.
After your phone comes up, you will have your old Blackberry Messenger back. Enjoy! source