The radios below will allow you to use US networks on your device, 2.32.00WU is recommended
DOWNLOAD 2.32.00WU HERE (recommended)
DOWNLOAD 2.23.00WU HERE
as usual,
YOU MUST BE SECURITY UNLOCKED IF YOU ARE NOT SECURITY UNLOCKED YOU WILL GET STUCK IN BOOTLOADER
This also implements a different method to the previous radios, so this will connect to your network on Automatic. According to testers it is flawless.
1.96.10WU Downloadable here - I *DO NOT* recommend this over the above radio, however, for those who won't use updated ROMs, you can use this radio, it is based on the old 1.96.00 STOCK radio but has NO connection issues and works in automatic mode.