Hi there. I've got few G973F which don't allow me to change csc when I insert a sim card into the phone flashed with OXM. The original csc was TIM, then i flashed it with OXM, where default language is usually spanish or italian, I don't remember, and it switched to BTU straight away. I used french, belgian, german cards etc. and nothing works, even tho same cards work with G970F. I tried to flash it network branded firmware and then OXM again and still nothing. Any suggestions that won't trip knox ?