Chat or discussion in Android QSupport between 2 androids devices

Hi,

It is often necessary to discuss with the user that I help. I use Teamviewer fremote for Android on one device, and Quick Support Samsung for the user's device.

I can't find how to strart a chat with the user. Is this feature availble or not exists ?

If available, how ? and is it possible to use it during a control session ?

Thanks in advance for help 

BR

Pierre