Hi Kobaltz: Thanks for sharing. I'm working on a project with devise, and I want to make user much easier to login with only a token which will be send by SMS. Here is the process: 1. input phone number 2. get the token by SMS and input it, then submit the form 3. if the phone number is new then will create a new user and sign in , or sign in with this phone number I feel this gem can do this . can you help me show some key steps to implement this ? (devise part and this gem ) thanks.