This solution will allow you to use a SIM unlocked D2G or Pro running the original release firmwareon AT&T or T-Mobile in the US.
This hack defeats the band lock that VZW had Motorola build into the radio firmware of all Droid global devices.
we have developed it into an update.zip format to make for as simple as possible an installation and avoiding the need for complicated software tools like RadioComm, which the original solution we had required.
This method can be done on any rooted and bootstrapped device that is running the release build.
We are also working on getting this radio to run under later builds and hopefully the recent GB release.
Right now you are absolutely limited to the original 2.4.29 for D2G and 2.26.2 for Pro.
You also MUST BE SIM UNLOCKED FIRST! THIS DOES NOT UNLOCK THE DEVICE FOR NON VZW SIMs!!
This hack also works best on a device that has been freshly flashed or has been deactivated or turned off for an extended period.
once you have flashed the phone using RSD Lite and the available SBF files, and rooted and bootstrapped with D2 Bootstrap, you simply place the file on your sdcard and boot into recovery and run the file from recovery using the Install zip from sdcard option.
Let it complete and then reboot and insert SIM and set it to GSM/UMTS only mode under Mobile Networks and it should provision automatically from the SIM.
This allows all bands for AT&T including HSPA+ but on T-Mobile it is limited to EDGE data because their deployment of their high speed data network is on a band not supported by the MDM6600 chipset.
The first file will unlock the US GSM bands and the second will relock the radio undoing the hack.
Have fun and enjoy! this was a very expensive and exclusive hack that is now free for everyone to use that has one of these phones.
EDIT: Links replaced with new ones that shouldn't expire, sorry!
Edited by CellZealot, 25 September 2011 - 05:12 PM.