On a flight with no Internet. Sent my friend a few Satoshis worth of ecash and possibly set an altitude record doing so.

From phone to phone. We're both offline.

Try it out on Cashu.me
 https://image.nostr.build/63c0601a240159e5e84702982c4df80d530b36c1551b9c8f3e25f86cc8280737.jpg