2-Step Verification -- Phone Option
STEP 1
Sign into Google
STEP 2
Click on the App Switcher (Waffle) and then select Account
STEP 3
Select Security on the left navigation (fourth option down)
STEP 4
Scroll down to the third box Signing in to Google and click on 2-Step Verification
STEP 4
Select which method of 2-Step Verfication you'd like to set up.