Calls fail when I try to merge two phone calls
- I make a phone call on my iPhone SE2020 (iOS 16.1.1) and speak to the recipient.
- I then try to add a second call (using the "+" button) - that works and I'm speaking to the second person.
- I then ask the iPhone to merge both calls using the merge button.
At that point, both calls are dropped with a 'fail' message..
So I can't have more than one other person on any call; I used to be able to this with no problem.
How can I fix this?