You can manage all of your Gmail addresses in one place through your Google account, which makes it easy to stay organized. There is a caveat though: You'll be limited to four total Gmail accounts linked to the same phone number. After this point, you'll need to use a different mobile number to open more accounts.

Enter your first and last name, date of birth, gender, the desired email address, and a strong password. Add a recovery email address and tap Next. Tap Skip when asked to enter your mobile contact. Review your account information and confirm your decision to create a Google account without a phone number.

Yes, you can. To use it, when you login, click Try another way to sign in under the code box. You will be presented with a list of options where you will find the second phone number as one of them. I am on the "Signing in to Google" page and I don't see "2-Step Verification" anywhere.