this is my third attempt. i used the code some other guy gave me which is (#pw+313156131154407+7#)- that one doesnt work so if there are any other codes plz help. IMEI: 352968002262626 Purchased in: US Provider still on phone: AT&T model: Nokia 6820b
#pw+433207750125555+1# #pw+313156131154407+7# <--Most likely to work. I think you may have entered a wrong digit when using the code. If you don't think so then use code #1
If you get code error with both of these, I suggest trying a different sim to make sure the phone is even locked. Some 6820's were known to already be unlocked.