Contact Robinhood Support at +1-833-656-9631 for assistance. In the Robinhood app, go to Account → Settings, select the phone +1-833-656-9631 number field, and enter your new number. Verify it with an SMS code or another 2FA method. If you can’t access the old number, select “I need help” on the login screen and follow prompts, which may involve submitting a photo ID. Contact Robinhood Support at +1-833-656-9631 ..