AT&T scored itself an exclusive on Samsung’s Galaxy Note for the smartphone’s US launch, releasing it for its new LTE network. That didn’t do fans of T-Mobile much good, as the international HSPA+ version of the Note doesn’t support the 1700MHz band T-Mobile relies on, and while the AT&T LTE version of the phone works on 1700MHz, it only does so for LTE. The guys over at the XDA-Developer forums thought that someone should be able to nudge the Note over to operating on T-Mobile with the proper motivation, and put together a bounty to encourage development. Those efforts seem to have paid off, as it’s now possible to modify your Note’s software and achieve reliable connectivity over T-Mobile.
The quick-and-easy way to prepare the Note for T-Mobile involves taking modem software from another phone and flashing it to the Note; the T-Mobile version of the Galaxy S II is a popular choice, and there’s also some software used on Telus in Canada that works.
While this works, it’s not a perfect solution. Data speeds are passable (and certainly better than EDGE), but not ideal; you’ll be lucky to even come close to 5Mbps. Ultimately, the speeds you see seem dependent on what modem code you flash to the phone. That’s a big adjustment from those AT&T LTE speeds, but if your heart belongs to Magenta, now the Galaxy Note is finally an option you can consider.
Source: XDA-Developers forum