: Use BlackBerry Desktop Manager to back up your contacts and messages .
: Run the downloaded .exe firmware file on your computer to install the OS files . blackberry 9790 flash file updated
However, time has not been kind to its software. If you are holding onto a BlackBerry 9790, you have likely encountered the dreaded "Reload Software: 507" error, endless boot loops, or persistent app crashes. The solution? A — the latest official firmware package designed to wipe your device clean and reinstall the operating system from scratch. : Use BlackBerry Desktop Manager to back up