Hacker News new | ask | show | jobs
by vasundhar 4413 days ago
1. Validation seem to happen when you send the first message to check if given number is associated with iMessage 2. Second time onward it only checks if the sender is in Data Network or not. 3. There is an option in the iMessage settings > Messages > "Send as SMS" if this option is not selected once the device/iAccount knows the other device is iPhone and you are on Data ... it just sends an iMessage.

Turn "Send as SMS" so that it falls back to SMS if the destination is not available for iMessage.