Where can I find a description of what "use by" means?

markinsf

    Just just got a phone with a pay-as-you-go plan.   On the t-mobile app account info is says "use by" 4/5 with no explanation.

     

    In the description of the plan here:

     

    https://support.t-mobile.com/docs/DOC-4826#fifthheading

     

    Again, no information.

     

    Anybody know where I can find what this date means?

     

    Thanks

      All replies