www.nfader.z-host.ru) goto this site u'll find an unlocker
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View This
View this to get ur phone undlocked
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sorry but no master security code can help you thinks its a job for nokia doc or try reflashing your phone with nokia service updater did that on my n70 once and it reset lock code back to 12345 if that dont work then take it to nok service center
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u should try dis one..
not bad laa..

http://www.nokialockcode.com/calculate.php
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i guess u hv to go to nokia will the bill.......

coz even after formattin it asks for the lock code....