My iPhone loses signal when i try to make a call
I have problem with my iPhone XS when i'm trying to make a call. The problem starts only when i'm dialing, phone loses signal and gets it back, loses, gets it back etc etc. Then it just drops the call and everything gets back to normal. I cannot also receive calls, but i can use internet from my carrier i can use FaceTime, and iMessages, and i can surf normally, use social networks. The only problem is with making and receiving calls. When i put my sim card in another phone everything works normal. I tried to reset network settings, reset phone, update phone to the latest software, turn the airplane mode on and off. I tried almost everything. Called my operator to check if there is a problem even though i can use my sim card normally on android phones and other iPhones. Only this one gives me trouble. Can anyone please help me?
iPhone XS, iOS 15