You can use it on your Android phone with https://play.google.com/store/apps/details?id=com.google.android.apps.hangoutsdialer https://play.google.com/store/app

You can use it on your Android phone with https://play.google.com/store/apps/details?id=com.google.android.apps.hangoutsdialer https://play.google.com/store/apps/details?id=com.google.and... - and I think FreeSWITCH has unofficial/hacky support for it (haven't tried) which would allow you to use it on like SIP supporting things