Here List of BB5 phones which supported dead usb flashing or which not supported!!
supported dead usb flashing
3120c
6300
6270
6280
7370
3250
6085
6086
6125
6131
6233
6300
6280
5200
5300
5310
5610
6290
5700
8600
3110
6555
6120c
6110
6500s
5500
7390
7373
7900
E50
E51
7500
N76
N81 8gb
5220
6500c
6290
5300b
5200b
5310b
Not supported dead usb flashing
n70
6630
6680
6681
n80
n73
n95
n72
n91
E61
E65
N73