Echo when Skype calling iPad Pro 12.9

User on the other end gets Echo when I am doing Skype video or audio chat. I have tried turning down the volume but that does not remove the Echo.

There is no echo when FaceTime is being used, but many of my contacts cannot use FaceTime because of Android or Windows PC devices.

I have contacted the Skype community. Others are having the same problem, but no solution found there.

No echo when using headset, but not the most desirable option. Need to take calls without having to find and attach external sound devices.

iPad Pro 12.9 256 LTE version.

Purchased March 2018

iOS: 11.2.6