[brsch]

Based on Coin's FAQ:

1. Yes, it should be usable with ATMs without issue.

2. You cannot lock your coin with a password, but it will deactivate after it loses contact with a phone after a user-specified amount of time. In theory, I'd assume you can disable Bluetooth on your iPhone and it will effectively "lock" your Coin until it can pair with your device again.

[dannygarcia]

Would be nice if there was a way to physically unlock it. I can imagine my phone dying – preventing me from making any kind of purchase.