Open Snapchat (you can download it from Apple’s App Store or Google Play). Go to your Snapchat settings (here’s how), then select Login Verification, and Snapchat will send you a verification code via SMS to the verified phone number linked to your Snapchat account (also found under settings). You must enter ther verificaion code to verify your device. Once you have enabled Login Verification, you will be able to verify additional devices, get a Recovery Code, etc.
