@zsharif80,
download the latest software from
www.gsmkingdom.nl
install it. this software will be installed in your program files directory under name ultimate-sam
inside this, you will find also the qualcomm drivers,
turn your u900 on without sim, insert this code: *#782872# you will get a confirmation popup. Do NOT confirm it and let the phone stay in that mode.
now insert your directly connected usb cable from pc to phone. when the drivers are asked, choose them manually from the ultimate sam folder. You will have to install 2 diffrent drivers. Qualcomm modem en qualcomm serial port.
now open your program, choose (u700-or newer) and press unlock.
wait about a munite and viola! you phone will be successfully unlocked.
good luck and best regards,
GsmKingdom