Oh no! Is it just silent for 35-40 seconds before you hear that normal ringing sound? If so, I've had that happen and I know how annoying that is. Does this only happen on certain calls to specific numbers? If you're calling from your contact list, can you try dialing the number manually with the area code to see if it does the same thing? We really wanna do everything we can to help so please give that a shot and let us know. Thanks!
Where are you located? Have you checked if VoLTE is turned on?