I have a Nexus 4. I don't use the OS native sip functionality on it, but I do use GrooveIP and I have run into this issue. With GrooveIP you can work around i

I have a Nexus 4. I don't use the OS native sip functionality on it, but I do use GrooveIP and I have run into this issue. With GrooveIP you can work around it by fiddling with the various echo cancellation options GrooveIP supports at the cost of introducing a voice latency on your outgoing voice that is just long enough to be annoying (but usable once you acclimate to it), in my experience. There are generally a lot of audio related issues with this phone with various users unable to get loud-enough volume from the device either on calls, from the speaker or via the headphones Seems to be a software bug as many people report if you root the phone and run alsamixer you can boost the audio up to decent levels, but this isn't a great fix because any time an app adjusts the volume at the SDK level the problem returns. https://code.google.com/p/android/issues/detail?id=41042 https://code.google.com/p/android/issues/detail?id=41042 Google's stellar customer support consists of no-questions-asked replacing your device (which is great) with one that has exactly the same problems out of the box (which is not so great). Haven't seen any kind of official acknowledgement of this as an issue despite it being very commonly reported online (google: "nexus 4 volume too low") An otherwise great phone hampered by a pretty serious fundamental issue.