Group FaceTime
I am unable to do group FaceTime with my friends, one is having iPhone SE and another one is having iPhone 7 with latest iOS and I am having iPhone XR.
Please provide solution.
To use Group FaceTime video calls, you need iOS 12.1.4 on one of these devices: iPhone 6s or later, iPad Pro or later, iPad Air 2 or later, iPad Mini 4 or later, or iPod touch (7th generation). Earlier models of iPhone, iPad, and iPod touch that support iOS 12.1.4 can join Group FaceTime calls as audio participants.
from Use Group FaceTime on your iPhone, iPad, and iPod touch - Apple Support
seems you can't do video group facetime with earlier models at all