I call T-Mobile and end up calling shenanigans.

A T-Mobile telephone support agent gave me a "100% guarantee" to reimburse me for a purchase I made for an equipment warranty exchange if I provided her with my bank account number and routing number. The T-Mobile agent said it would take 5 to 7 days before the refunded amount would be deposited in my bank account. I declined her request for my banking information and asked to speak to a T-Mobile supervisor. This same agent gave me erroneous information about T-Mobile's buyer's remorse policy. This was confirmed by her supervisor. It is my understanding that all conversations between a T-Mobile employee and a customer are recorded. Playback is hell.