Revolution - If you don't have certificate and key then hack your phone cause if you hack your phone then you can install every kind of apps on your s60v5 phone.
See my tutorial which includes screen shots..
Hacking is not harmful for your mobile. it gives you full freedom of having a symbian phone.
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FreeSpace Really useful midlet! Delete unnedeed files and get more free memory in your cell phone
Password Hacker Mobile And Pc Master password cracker for Java mobiles and Symbian mobiles