Add Mobile Phone Number
Once a mobile number is added and verified, you can use it to sign into your Amazon account and reset your password, in case you forget it.
To add a mobile number to your Amazon account:
Go to Your Account. Click Change Your Account Settings.
From this page, click Add corresponding to the Mobile Phone Number option. Note: If you have already added a mobile phone number, that is unverified you will see an option to Verify that number.
Follow on-screen instructions to add your mobile phone number.
Once added, you will see an option to Verify this number. Click this option and we'll send you an SMS with a One Time Password (OTP). Type this OTP in the on-screen dialogue box and finish the verification process.
To be able to use your mobile number to sign into your Amazon account or reset your password, you should complete verifying your mobile number as mentioned in Step 4.