Changing CSC

My device is from iran and I am in turkey now
I've used turkish firmware before but it was not getting OTA updates so I switched to Iranian one which matches my original CSC file but now I am not able to get vowifi neither voLTE Although I tried to edit other.xml vb.. vb..
Now I want to convert my phone to 100% turkish.. Original CSC code and Active CSC code and everything.. with ability to using OTA updates (throw flashfire of course).. with working volte and vowifi..
What are your advices ?


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