Mute turning on during calls
So I've only taken 2 calls on my phone since I got it on Monday. But I did notice that the first call the caller could no hear me. I pulled the phone away from me to check my signal strength and noticed that it had switched to mute. Then today I took a call and about 2 minutes into the call the caller again couldn't hear me. Again I checked my signal strength thinking that my walking around may have an impact (I do have a notification on that says my calls will be made over WiFi) and again the phone had muted itself.
Anyone else experiencing this?
TIA