https://trxsupport.magellangps.com/hc/en-us/community/posts/33707681637527-How-Do-I-Update-My-Phone-Number-on-the-Robinhood-App-Instant-Refund https://trxsupport.magellangps.com/hc/en-us/community/posts/33707713837847-How-Do-I-Change-the-Authenticator-on-Robinhood-Instant-Support