Step 1: Login to your Google account and then navigate to ‘Google Account Management’ on the top right corner
Step 2: At the top, tap Personal info.
Step 3:Under “Contact info,” tap Phone.
Step 4: From here, you can:
Add a phone number: Under “Your phone numbers,” select Add recovery phone. (We recommend that you add a recovery phone number if you haven’t already.)
Change your phone number: Next to your number, tap Edit Edit and then Update number.
Delete your phone number: Next to your number, tap Delete Delete and then Remove number.