No sir, whatever software update you received didn't enable 700A block capability because the hardware isn't Band 12 capable, it's Band 17. I even pointed you to the FCC documentation to show you this and there have been no permissive changes to that device either. The only way that you're getting 700MHz LTE with that particular device is if you're using an AT&T SIM, not a T-Mobile SIM. Everybody has been trying to explain this to you but hey, if you don't wish to believe us or the FCC so be it.
Come to think of it, a simple screen shot from Signal Check Pro might be able to settle this issue.