Following October’s news that Samourai Wallet was preparing to enable internet free bitcoin transactions, somebody only went and tried it. A Twitter user from New Zealand documented his off-line experiments online.
The ability to send bitcoin (BTC) 00 without internet or data connection relies on the goTenna mesh network. First, Samourai wallet creates a signed transaction and passes it to the TxTenna app. This then broadcasts the transaction to nearby mesh nodes via a paired goTenna mesh device.