The idea is very interesting, it is a pity that you will not be able to implement it.
Because the government won't let you do it.
Why wouldn't the government would approve? What may happen is the difficulty of approval - homogolation with the country in which you want to use the BOB or the phone.
Agree, think of internet in the beginning and our current situation.
Blockchain will not more devices to implement and daily stuffs like phone is one of the key