: Use BBSAK to "Wipe" the device. This will result in an "Error 507" on the phone screen, which indicates the OS has been removed and it is ready for a fresh install.
To use firmware from a different carrier, navigate to C:\Program Files (x86)\Common Files\Research In Motion\AppLoader on your PC and delete the vendor.xml file. Connect and Update: Firmware Change Update on BLACKBERRY 9780 Bold
Open your PC file explorer and navigate to: C:\Program Files (x86)\Common Files\Research In Motion\AppLoader\ Locate the file named . : Use BBSAK to "Wipe" the device
Helpful if you need to pull specific data out of old backup files later. look for or your device's PIN.
In the AppLoader communication port dropdown, look for or your device's PIN.