Hi, when somebody calls me they can hear an echo, just like describer here: /t5/Xperia-Z2/Echo-issues-during-phone-call/td-p/659777. We tried this with many phones/networks and I've realized that if I turn to zero my microphone and then I turn it up gradually during the conversation this fixes the issue. However this is annoying and I was wondering if there is a reason for this to happen or if there is an issue with the phone. This only happens during regular calls, it doesn't happen on Skype/Messenger/WhatsApp calls and it doesn't happen if I use a headset.
Probably it can be a network career issue, try calling different locations may be it is only for a particular location, also there are many options in audio settings try all and keep one better for you.
