Ok, So I fixed this it seems. It was that bat Build prop causing the boot loop.
However, now it's happening again. I made the mistake of trying a different framework file (which was meant to force the browser into desktop all the time). And it gave me bootloop. So I reflashed 3.1 etc, and tried again. It loaded (without Telstra service again), so again I repushed the frankenrom build prop (which had worked previously) and the connectivity settings. But again bootloop...I can't get my tab to be alive and have telstra connectivity
EDIT: Thought after reflashing I may have been missing the Wipe data/factory reset step, but did the whole process again, and still no luck!
It's so strange! I can get into the OS without Telstra connection, but once I push those settings it boot loops?! Is there anything else I can try?
Are you sure you are using the correct settings files and build prop? using the stock files will think you are on verizon and say "searching for service..." and using bad files will throw you into bootloop.
I had both issues, and was fixed by repeating the 3.1 update, flashing the bootloader patch immediately as suggested, reboot into fastboot and then pushing the settings files and frankenrom build.prop
let me know how you go