There are three primary reasons why someone would seek out these specific firmware files:
Each receiver has a specific Hardware ID. Flashing a 1506F file onto a 1506T box (or vice versa) without modifying the ID will usually result in a "Hardware Mismatch" error or a bricked device. Download 1506T,F bin
Many hobbyists download "patched" versions of these files to enable advanced protocols or to change the UI (User Interface) skin of their receiver to a more modern look. Compatibility Warnings The 1506T and 1506F chips are similar but not identical . There are three primary reasons why someone would