Your account must already be active to log into the mobile app.
Step 1. Go to the Google Play, then click install.
Step 2. Once installed, open the app, sign in with your email and password, and then click the check mark in the bottom-right corner.
Step 3. Lastly, you will be sent a 4-digit PIN code to verify your account. Enter your PIN and select "remember me" if you do not wish to be sent PIN codes for each mobile sign on in the future.