Here is how to UNLOCK your samsung D807 (cingular) ...now you can use it w/ any GSM service Provider!!! I HAVE PERSONALLY done this and I KNOW IT WORKS...THIS IS A PERMANANT UNLOCK

1. If you have changed your phone password, change your password back to the default 8 zeros (00000000).

1a. NOTE (Modification here by my experience): Goto SETTINGS, SECURITY, then SIM LOCK and disable this before proceeding.

2. Put a SIM card that is from a network other than the one your phone is locked to (I used a TMOBILE card from my buddy Darin)

3. When Incorrect SIM (I got invalid card and there was a sim card graphic spinning) error comes up, type *#9998*3323#.

4. White screen will appear with an exit option. Press the right softkey. (I ended up pushing the down key to get a menu)

5. From the menu that appears, select the Malloc Fail option. This will reboot the phone and the normal service screens will appear.

6. Type *0141# and then press the green call key. "Personalization" or "Personalized" will appear.

7. Turn off your phone and put the original SIM back in.

8. Turn on your phone. You will receive a prompt to enter a password.

9. Type 8 zeros (00000000) (This is because the SIM LOCK Mentioned earlier gets switched back on)

10. Completed. You have now unlocked your phone.

I Took some times to post this for your aid so PLEASE take one monet to click on YES before closing this window...thankyou!!!!