yes you can unlock it, you will need the 15 digit unlock code:
1 – Switch ON your phone without SIM Card,
2 – Compose #PW+CODE+1#
(if locked from Fido/Roger Canada, please compose#PW+CODE+7#)
The letter P appear after press 3 times quickly the button star ( * )
The letter W appear after press 4 times quickly the button star ( * )
The letter + appear after press 2 times quickly the button star ( * )
3 – The phone show “SIM Restriction Off” and was unlocked !
If you don't the code already you can get the Nokia Unlock code HERE
Cellunlocker.net - #1 Phone Unlocking Site on the Internet
100% Guaranteed or your Money Back! Lowest Price Guaranteed!
toll free: 1-800-507-9077 email: firstname.lastname@example.org
I am sure that you can unlock your Nokia 2760.you didn't mention here whether your phone got network unlock or security unlock.if it is security unlock means you can unlock it by flashing your phone's operating system or if it is network unlock means you can get the unlock code by online providers..recently i got unlock code for my Nokia c3 at www.superunlockcodes.com .they provided me the code with instructions too...so i think you can try this and sure you will get success....