In case you lost your phone, please follow the following process to get the MFA setup on your new phone:


Get an approval from your manager and Contact our Support team at support@messagexchange.com to deactivate your MFA.


Once we deactivate the MFA, you would need to set it up again on your new phone. 

Refer https://messagexchangesupport.freshdesk.com/support/solutions/articles/7000042150-how-do-i-set-up-multi-factor-authentication-mfa-