Can I Unlock my 6800 Nokia

I have a Nokia 6800 that was on T-Mobile, and I would like to use it with my cingular account. I put my cingular sim card in and it says restricted. I have tried all of the codes I can find, but no such luck. If you can help me, let me know, I purchased the phone in the US.
Fungo

 

Have you gotten the message "can not undo restriction"? If not, what is your 15 digit IMEI # ?

 

where do i get my IMEI number?

 

Press *#06# and it will display.

 

got it, thank you, 010282002237925, what next, should I put my cingular sim back in it?

 

No sim in at all!! Enter the code from insert sim screen. Directions are below.

#pw+889211302745567+1#

 

Great, "phone restriction" is off, what do I do now?
Fungo

 

Put your Cingular sim in and when you start the phone it might say T-Mobile because that's what is programmed in the phone but once it boots up and gets a signal, you will see Cingular on the screen.

 

Thank You Thank YOU, Thank You

Fungo

 

Just be glad you didn't keep entering other peoples codes too many times. You're welcome!!