I have just flash recovered a K300i and when i insert an O2 sim card i get "inactive sim" for a few seconds then the o2 sign appears and incomming/outgoing calls are barred.

If i try an Orange sim the phone works fine...

Anyone any idea's on a fix for this as i need it to run on o2?

I have a feeling that i have 4 locks closed but i am looking for the phone function at the moment that will show this information.

Managed to fix it, thanks for looking.:D

i have same problem but i have only work sim just 5ive minute work what i can do! my k300 say "inactive sim"