You're right — at the end of the day, for a transaction to settle on a blockchain it must *reach* the network. 
The important distinction here is not whether **someone, somewhere** has Internet, but whether the **user** needs it.

With Bitsend the wallet itself remains fully offline. Keys never leave the device, and the user doesn’t require Internet to generate, sign, or submit a transaction. 
Instead, a lightweight relay layer transports the signed payload towards the chain. That relay doesn’t have to be IP-based — it can be any channel capable of moving bits from A to B. 

So from the user’s perspective:
- They don’t need Internet. 
- They don’t connect to nodes directly. 
- They get back a cryptographic receipt confirming their transaction. 

Whether that relay path at some point touches the Internet, radio, or any other medium is abstracted away. That’s why we call it “offline-first”: the wallet and user-side experience is 100% independent from Internet availability.

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