The idea is that the payment receiver doesn't need to do it. The payee needs to have some kind of uplink (like a mobile phone, amateur radio, or anything).

There are mobile payment applications already, but they are doing it using centralized service and they need make deals with payment agents. With Kryptoradio it is possible to receive payments without any extra middlemen.

That would require trust - in the form of the SMS provider. No way to verify that SMS is valid, it could have been forged.

The proof-of-work blockchain transmission means it's the real and proper blockchain and is valid.