help me unlock nokia 6620 locked to cingular network usa amie 355050000204459

i have tried this code before #pw+789380504600177+1# it does not say code error or phone restriction off all it keeps saying insert sim card pls help me

 

What sim card "WILL WORK" in the phone, is it blue with AT&T or orange with Cingular on it?

 

its orange from cingular it works on fine on cingular when i insert t mobile or at&t simcard it says sim card not invalid because this phone is not unlocked please help me solve this problem when i type the unlock codes which i got here from the forum it says insert simcard as soon as i type the code

 

#pw+789380504600177+1#

Insert a non accepted sim, press the UNDO option. You will see a box pop up that says "enter restriction code"
Enter the code in the box and then press ok. Do this once and post back the message you got.

 

i did follow the proceedure i dont get any box or asking for restriction code it just said invalid sim card i tried a t mobile sim card and a T& t sim card it said invalid sim card for both

 

Make sure that the sim cards you are trying are activated and working in another phone because you should be getting a "Phone Restricted" message if the phone was locked.

 

the sim cards are working in other phones

 

no limit please help me and reply to my thread