Had a Vodafone branded S5, and I just downloaded the BTU generic firmware and flashed it over.
None of the phone was reset, the apps were still there, apart from the vodafone bloat, that had gone.
Running a phone info app, it says original CSC is VOD, firmware CSC is BTU, active CSC is VOD/BTU
Anyway of totally flashing BTU and getting it to reset fully? I flashed using Odin 3.09 using the firmware in AP and F. Reset Time and Auto Reboot ticked