My calls have been dropping for the past month and half. After contacting telus they sent me to apple and apple gave a replacement device . But it is still happening and telus doesn't wanna do anything about it. All they are is sorry . If I wanna cancel the contract they even want me to pay for the cancelation fees. such a stupid company . i have been with them 4 years .
There are a number of different things that can cause calls to drop. Your post didn't include any details.
it is an iPhone X, with latest ios. Calls are dropping everywhere even in downtown . There is a tower near my house but the calls are still dropping. I am using VoLTE, i contacted apple and they did the diagnostic and told me 35/625 calls drop over the past 14 days.