Enable 4gv= Go to your dialer and dial ##3282# enter your msl and you should see a data programming menu select edit you'll be prompted for msl again just re-enter it. Select advance and you should see something like this
1) Turn on USB Debugging in the Settings > Applications > Development menu
2) Change your "DM" mode to USB on froyo
__a) Get your MSL: "adb shell getprop ril.MSL" (if you don't know how to use ADB, ask for help before following this)
__b) Enter the DM menu dial ##8778#
__c) Enter your MSL
__d) Select USB
To change your phone to DM mode for gingerbread
__a)Dial ##7678#
__b)Enter your MSL
__c)Select DM and your phone should reboot in DM mode