I did everything correctly. So what happened exactly?
I tried to find something on google, but ended up with some QCN file editing guide. But there is no QCN I can find to download anywhere for 12T Pro.
After flashing this ROM on 12T Pro, I lost IMEI numbers, "Sim cards & mobile networks" menu doesnt work, after puting sim card nothing happens. Everything else like wifi and bluetooth is fine.
Is there a way to fix this or I need to buy new phone?