Have you tried how many times please specify.You have tried 5 times means You cannot Unlock it...Because Nokia has only 5 Unlocking tries,You need to flash it after missed the tries.,if you not missed five attempts means You can Unlock it simply,you have tried what method?
You can unlock it simply using the unlock code,You can get the Unlock code from here
Theunlockarena.com and Unlock it from Network Lock,then you use any GSM Network Sim card....You can enter the code correctly using the Unlocking instructions below,But specify the Network lock,country to get the code,Because CDMA Network won't be get Unlocked ,only GSM Network lock can be unlocked.
Nokia N8 Unlocking Instructions
Warning :
Do not enter any wrong unlock codes on your Nokia N8 mobile phones. If
you enter over a certain amount of wrong unlock codes on your Nokia N8
mobile phone, your phone may get hard locked and sometimes become
unusable.
1 - Switch on your Nokia N8
without any sim card.
2 - Don't bother as to what is displayed on your Nokia N8.
3 - Compose
#pw+CODE+1#.
4 - The Nokia N8 would then display the message "SIM Restriction Off" and will be unlocked!
Note :For Nokia N8 mobile phones locked to the network Fido or Rogers in Canada follow these instructions :
1 - Switch on your Nokia N8
without any sim card.
2 - Don't bother as to what is displayed on your Nokia N8.
3 - Compose
#pw+CODE+7#.
4 - The Nokia N8 would then display the message "SIM Restriction Off" and will be unlocked!
The letter
p appears if you press the button star(*) three times quickly
The letter
w appears if you press the button star(*) four times quickly
The symbol
+ appears if you press the button star(*) two times quickly
The
CODE you need to enter is the unique unlock code for your Nokia N8
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