If you wish to change your 2FA device or use a new OTP application to secure your account then you can remove the current 2FA device from users on the account.
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Need some additional help our support teams?
Phone on 0333 0142 700 (available 24/7)
Live chat here: https://help.fasthosts.co.uk/app/chat/chat_launch/ (You must be logged into your account and chat is available Monday – Friday 09:00 – 18:00 GMT)
Raise a ticket here: https://help.fasthosts.co.uk/app/ask (24/7 and you must be logged into your account)