YOU HAVE A USB CABLE TO CONNECT YOUR UNIT TO PC (WINDOWS) YOU CAN UNLOCK YOU NEC EASILY!
Check this site www.alibutt.com/index.php?p+126#comments for NECTALK as well as the USB drivers (if you don't have the original CD with synchronization software), a program that allows you to unlock your unit.
1. Unzip the NECTALK (go to www.3spades.net/nectalk.zip and unzip the NECTALK file) and install USB drivers (www.nechdm.com/synch.asp and click Install USB Drivers for a zip file).
2. Create NEC folder and drag the NECTALK files (should be 2 of them) to that new folder
3. Connect your phone via USB cable to computer
4. In START menu go to RUN and type COMMAND (Win 98, Mi) or CMD (Win 2000 or XP ): A black window (DOS mode) should pop up with C:\ _
5. Type cd NEC and press ENTER. You should get C:\NEC>
6. Now, connect your phone (make sure the unit is on) via USB cable to computer and type nectalk -pt unlock. The program should check several ports (Trying port 1, 2, 3...) to locate your phone. Once detected, the program will display found PTE code: 0079.
7. Your phone is unlocked!!!!
8. Disconnect the usb cable and insert your SIM card. The phone should display previously registered/locked on carrier with SOS mode for several seconds (AT&T for US customers). After that your service providers name should appear on the screen's upper portion (together with date, time, etc) with fully functioning phone