TxTenna and GoTenna are innovative solutions that make Bitcoin transactions possible without internet connectivity. GoTenna is a device that pairs with your smartphone, enabling it to communicate with other GoTenna devices within range to create a decentralized, peer-to-peer mesh network. This network operates independently of the internet or cellular service. TxTenna is an Android app that interfaces with the GoTenna device, enabling it to send and receive Bitcoin transactions over the GoTenna mesh network.