Huge security risk. If you change numbers, you have to change the number associated to the account from the old number. 0 support unless I sign in but cant sign in due to changed number. Cant even fill a form cause I dont remember my last number. Robinhood never stated this gimmick and has now robbed me and hasnt returned my emails. I want my account closed. I want my money refunded. I want a response from the company.