ok so i wanna reinstall all the bb os updates starting from the original os it was shipped with to solve a few problems i have been having , like bb maps i forgot to install it and other quirks.
You'll have to find a older version of the OS. Uninstall the current one if its on your computer, install the older OS onto your computer and then install it to your phone. Pretty much the same process as upgrading but you are now doing it with an older version of the OS.
Downgradeing
