It is INCREDIBLY frustrating to constantly talk over my clients, or them over me, because of the horrible delay in hearing each other! I used to make calls directly from my phone's app. To avoid the delay, I though I'd try make calls through my back office (i.e. having the number dial my cell phone from my laptop)Still a delay. A "network issue' does not sound like my problem. Any suggestions, one way or the other, of how to rectify this problem? I have a Samsung Note 4, and my servicer is T-Mobile.