Setting Your Phone Number
Tap the gear icon on the upper-right corner of the Profile screen.
Tap "Mobile Number."
Type your phone number into the space that says "Mobile Number" and press "Verify."
On the pop-up, tap "Send via SMS” to receive a text message with your verification code, or if you if you prefer to receive the code by phone call, tap the “Call me instead” button. An ‘Unknown’ number will call your phone with a verification code.
*Please note that standard text messaging fees apply. The text message is sent from a U.S. number-- if you are an international user, your service provider may charge you an international SMS fee. You may also have to enable international text messaging with your provider.*
Enter the verification code from the text message or phone call into the app and tap "Continue."