If you want to save yourself the trouble of hacking your way into the 2210-02 to simply get your modem online due to AT&T’s foolishness, you can just update your modem using this firmware file. It was downloaded directly from AT&T’s server, and a few people have told me it works. Use at your own risk, though!
nta787r27_attsw.bin MD5 (nta787r27_attsw.bin) = 715b2b5d3071731fffbb91ca686a5377
If you’re interested in how I obtained the file, I may post the method I used or tell you about it. But for now, I’m going to keep it to myself in hopes of re-using it in the future.
And if you’re from AT&T and for some reason think posting publicly available firmware files is somehow against the law, please contact me and I’ll take the file down. I can’t afford to fight a frivolous lawsuit! As far as I know, posting this file is completely legal.