Bitsms allows you to send Bitcoin via SMS, without an Internet connection. To use it, text a signed raw transaction to the number above. Bitsms was created for Orum Wallet.
Bitsms increases the accessibility of Bitcoin, allowing it to be used in places with cellular infrastructure but no Internet infrastructure. It also allows for sending Bitcoin on a cellular plan without data.
Bitsms is not a wallet. Instead, it is an SMS to Bitcoin relay where you sign a transaction in your wallet and text it to this number. Most wallets allow you to sign raw transactions offline.
Bitsms is open source and available on Github.
Here are instructions on signing a raw transaction for various wallets:
This is an upcoming feature that allows you to send transactions, even if you can't text SMS messages larger than 160 or 67 characters. This works by splitting the transactions into separate parts.
It is recommended that you download this page to use it offline. On desktops this can be done by going to File > Save. ⌘S is the macOS keyboard shortcut while Ctrl+S is the Linux/Windows shortcut. Here are instructions for saving a page offline on a mobile device:
Read the developer guide for steps on running a Bitsms instance and integrating it with your apps.