I had the Airpods 1 with my iPhone X and call quality was fantastic, I was amazed that people could even hear me at work as it is a very noisy environment, I gave that pair to my daughter as I found I wasn't using them much. some time later I purchased the iPhone 11pro and then a pair of airpods 2, I mainly used them for phone calls at home in a quiet room and had no problem with phone calls, I then took them to work and immediately found that if there was any ambient noise people could not hear me at all, tried all the re pairing etc etc and ended up returning them for a refund thinking they were faulty and ordering the airpod pro, and as mentioned they are worse than the airpods 2, if I am in a quiet room they work fine, but something has changed, I recall when the series 1 was released they had that special cone algorithm microphone to pick up just the noise from your mouth, it is so disappointing that this is the case, I only have these for phone calls and was so impressed when I had the series 1, that is why I thought the series 2 must have been faulty, but it is obviously an issue with the later series or the updates, I find that even my 11 pro isn't as smooth as my X with the touch screen, I feel all the things that once made Apple my goto choice without question starting to fade, things should be improving when you upgrade not get worse, we pay $2000 for an iPhone 11pro here in Australia and $400 for the airpods pro, pay more get less, come on Apple lift your game