Iphone 3G Can't dezactivate PIN

[kycround]

Hello,
I have 2 iPhone 3G 2.2 FW with 02.28.00 Baseband.
I can't make them work.

I restored using the 2.2 FW.
I jailbreak it after.
I used Yellowsnow.

1) first time i didn't dezactivate SIM PIN and 3G - didn't worked.
2) second time i dezactivate 3G and installed Yellowsnow without any SIM inserted, i restarted - it worked, i restarted again didn't work.

I can't dezactivate the SIM PIN.
If i enter the phone letting it UNLOCKed and i go to Settings -> Phone -> SIM PIN i choose SIM PIN to OFF, it asks me the PIN, i enter it, and after that it says saving... and it don't do anything. I press HOME it return to the Main Screen but didn't change the Settings. I go back again to SIM PIN and everything is GREYED.

ps: at the operator logo is nothing and i have one bar signal.

What can i do?

[tl1000sy]

I had to deactivate the sim pin on an old nokia and then you will have to jailbreak with the sim card you want to use already installed in the iphone

[kycround]

How?
You cand disable sim request on the specific phone, so when you disable the pin on nokia, it wouldn't be requested on nokia.

i tried to change the pin on nokia setting it to 0 characters but i'm not allowed.

please, does anyone know? can you please help me? it's important.

Thanks.