Don't think it's any better in terms of privacy, but it's a lot cheaper (or was, haven't looked into mobile plans in a long time), and it would condition me into not using it or relying on it often such that I could turn it all off and use it only when I need it out and about. I'm not away enough ...

It also give me a little more ownership or control over my phone number. If it's a DID owned by my account on my SIP provider, I can provision that number to any device I want with my pbx, I don't need permission from my mobile carrier to which device/sim it belongs to. I can move carriers without w...

Like Asterisk with a grand stream ip phone running on a Radxa