The most stable and updated version is v7.1.0.1047 .
Your device will restart and show . This is normal and means it is ready for the new software. Run the Loader: In the same AppLoader folder, run Loader.exe . blackberry 9790 flash file updated
Click and wait 10–20 minutes for the process to complete. Troubleshooting and Legacy Support Firmware Change/Update on BLACKBERRY 9790 Bold The most stable and updated version is v7