I cannot call or message a specific US number.

magenta4710320

    I have a Galaxy Core Prime with a T-Mobile prepaid account.  Unlimited calls and texts and it is current.  I tried to call a friend and I get a message that my balance is too low and I meed to add funds to my account.  I tried to message the same number and got a reply instantly that says Unable to send mesage -  Blocking is active.  I don't have blocking  on.  Any help is truly appreciated.

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