Firmware upgrade failed

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http://forums.androidcentral.com – I have ATT Galaxy Note that I got the unlock codes from ATT. I have used it overseas. After I left ATT I am stil using the phone with TMobile sim. I currently have Gingerbread (2.3.6)Baseband version: I717UCLA1. I tried upgrading the firmware with Kies but as soon as I connect my phone, Kies automatically tells me an upgrade to 4.1.2 Baseband version:I717UCMD3 is available. I have tried several times Kies becomes unresponsive after downloading the firmware upgrade files/components. I have tried to upgrade a) with my sim and external sd card in the phone, b) taking out the sim only from the p (HowTos)