Step 1: Have the iPhone pop up saying "do you want <Pebble watch> to be able to send messages?" and let the user decide which devices can send their phone messages.
Step 2: Have the iPhone pop up saying "do you want <Apple watch> to be able to send messages?" and don't just assume "yes"
Both steps would improve security, even if they harm Apple's profits.
Step 2: Have the iPhone pop up saying "do you want <Apple watch> to be able to send messages?" and don't just assume "yes"
Both steps would improve security, even if they harm Apple's profits.