The following company enables users to sell, buy or trade cryptocurrencies without the need to connect to the internet. This sounds too good to be true isn’t it?
https://allohash.com/I want to know about this futher more 🙂
Actually, it is not as cool as you think. At least in apps like Crypterium, it is possible to send crypto between users by number (this requires the internet too, but it looks similar). Also, using phone numbers is the greatest danger for your privacy. In countries like Portugal, the phone number is like your identity and I do not think it will be useful here.