"This phone number cannot be used for verification" To protect you from abuse, we limit the number of accounts each phone number can create. You can use a family member or friend's phone number instead. It may also help if you attempt to use a number from a different phone carrier.

It could be that Google has blocked that number for verification because it has been used too many times or a number is a VoIP number that google regards as invalid for phone verification.

Account Recovery Form:Go to Google's Account Recovery page. Enter your email address and click "Next". Since you don't have access to the linked phone number, click on "Try another way" when asked for a verification code. Google will then propose alternative methods to verify your identity.

To get started, head to g.co/recover and enter your Gmail address. If possible, try the following to make recovery easier: Use a computer, phone, or tablet you've previously used to sign into your account. Use the same browser that you usually do, like Chrome or Safari.