I think you read a bit too much into my message. I agree, it's complicated, I don't want my parents and grandparents easily getting scammed.

But yes they are my devices, and I should be able to do exactly what I want with them. If I'm forced to deal with other developers incredibly shitty decisions around how they treat VoIP numbers, guess who's going to have a stack of phones with cheap plans in the office instead of paying a VoIP provider...

But no, I have no interest in actually distributing software like that further than than the phones sitting in my office.