Everyone keeps on saying that the Pyra is not a phone. But, realistically, what is a phone these days anyway?
My phone systems have all been VOIP for 10 years and I can make calls from ANY device that can run a SIP client. Our new email system has video conferencing built in, so on top of the telephone system going software, the calls are moving to the web for any devices that supports webrtc. Literally, all workstations are having their monitors replaced with ones that have cam, mic and speakers built (HP) so that every single workstation is fully conference capable (to catch up to laptops).
I also intend to absolutely use it to place voip calls via 4g + bluetooth capability. It's not going to be nice to use at all at first, but who knows. Maybe some hacking will make it okayish.