Having a phone number is necessary for creating a Gmail account - https://emailspedia.com/how-to-create-a-new-gmail-account/. However, you don't need to have a phone to sign in to your Gmail account. You can still sign up for most other services on the internet using your mobile device. Once you're registered, you'll be able to access your Gmail account. It's best to make sure you have your phone number on hand.

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