Galaxy S7 at&t branded not receiving OTA's as promised

choefs67

    I recently purchased a Galaxy S7 at&t branded phone to use on T-Mobile. It is unlocked, but it is only running 6.0 firmware. The phone isn't receiving any OTA's as promised by tmo. Now the phone is not receiving some texts and I  worried about the security of the phone without the latest updates. What can I do???

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