Sirin Labs are developing the world's first blockhain phone (no this is NOT a promotional add, and I am not being bribed by Sirin – don't you think they'd get someone with a decent about of Steel Power to do that?) which, incidentally happens to be pretty secure. The phone is actually surprisingly economical as well (it costs about as much as the iPhone X – but the specs are better). Curiously, there is also a blockchain computer...