Paying Bill from Overseas, but cannot access My-TMobile.

vastdeferens

    I'm currently trying to pay my t-mobile bill. However, when I try to log into my account, it asks me to "link a phone number," but it doesn't allow me to link the phone number my account is already linked to, nor can I get cellular signal when I insert my SIM card overseas to actually receive the SMS. Please advise, thank you!!!

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