Every time I'm on a call I hear myself echoing

Turns out this is a common issue with the iPhone 11 Pro Max (possibly Pro) that may be corrected in an update if it is software based. If it is hardware based, nothing will fix it but it also wouldn't happen along multiple phones. So basically it seems we need to be patient until Apple figures out the bug and fixes it. However, the more they know about when it happens the faster they can pinpoint the issue - so keep reporting to Apple Support.

My wife is having the same issue right now. She has the same phone.

I had the same Problem. I took my phone into Apple. They replaced the phone and I am having the same issue. It’s normally when I am on speaker phone. I am very disappointed

I am having the same issue. Replaced the phone, and problem is still happening. Issue is only when using the speaker phone - both in my car and through the handset.

We are having same issue and have also done the 'trade up' thing after two days of ownership on my wife's new 11 Pro Max. Here's all the steps we did at Verizon store

1. Swapped SIM card and reset the network on my phone
2. Swapped SIM card and reset network on the new iPhone 11 Pro Max
3. Changed out phones, didn't hear echo at store but tried briefly as the store was closed for the evening and trying to get out so they could close up.
4. Tried today and echo back.

Again, only on speaker, volume changing didn't change outcome. No echo on hand holding to ear, no echo through AirPods. One suggestion my son had was to 'detach' the AirPods from the bluetooth options, then reconnect them. Will try this later today.