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To reset your Gmail account without a verification code, first visit the Google Account Recovery page. Now enter your email address, then click the Next button followed by choosing Try another way until you get one you can use, such as giving the security answers or typing in your earlier password. You'll also likely be prompted to type in an alternate email address where Google can send recovery instructions. If you are successful, Google should be able to verify your identity and help you reset your password. Remember that afterwards, best update your recovery options so you won't have the hassle of doing it all over again next time around.
How to Recover Gmail account without verification code?