"Type your password into your telephone"; already they're asking me to do the wrong thing. If my password is anywhere near secure, then typing it into a phone would be a nightmare. A combination of 16 numbers and letters that I need to convert to numbers? I'd be pressing zero and hoping for an operator before I even opened up my password vault to find the secure password to begin with.
If you want a phone interface, give me a PIN option. Sure you'll not want me to be able to buy plane tickets with just the PIN, but that should be sufficient to protect user data.
If you want a phone interface, give me a PIN option. Sure you'll not want me to be able to buy plane tickets with just the PIN, but that should be sufficient to protect user data.