YouMail utilizes a carrier feature called Conditional Call Forwarding to receive your missed calls and connect you to our system. Metro by T-Mobile does not support Conditional Call Forwarding (CCF) so YouMail can’t work on their network.
Most carriers support conditional call forwarding. YouMail is contingent on whether your carrier provides CCF because without it, you won't be able to activate or utilize any of our system's features.
So why is Metro by T-Mobile restricting my access?
You can call Metro at 888-863-8768 to request they add ‘Conditional Call Forwarding’ like almost all other carriers.
YouMail recommends Mint Mobile for cheaper and better phone service that supports YouMail.
For more information regarding Conditional Call Forwarding, check out this article.