Always do a backup of your Settings and Contacts using Desktop Manager and 3rd-party apps.
Use BBSAK, you will see me mention this app a few times.
officially dropped Black Berry OS 184.108.40.2068 for Curve 3G 9300. This guide should work for any upgrade of Blackberry OS to the latest version. Blackberry Desktop Software, can be downloaded at 2. It is highly encouraged that you backup anything before upgrading. This software, if any new software update found, will prompt you that an update is available. Make sure the available new version is correct, Version 220.127.116.118 (Bundle 1676). Click the ‘Install Update’ button to start updating. Please wait while the Black Berry Software Device Software is updated. You can savely disconnect the device from the PC/Laptop.
Simply follow the wizard and select the applications you want to install.
Once this is done, you just have to click “Next” until the process is finished.
You then simply select the applications and features you wish to install and follow the wizard until you are done with the upgrade.
I NUKED MY BERRY: something went wrong with the upgrade.
Any smartphones running an earlier version of the Black Berry OS could not be updated to version 7.0.