In Latest Nokia S60v5 phones (like 5230) applications cannot be run (or are in limited mode) without Signing the applications. Here I will show you the methods to Sign the Applications.
Before we move on to Hacking the phone to run unsigned applications the following are the Requirements.

Requirements

• Certificate for your Nokia
• Key for your Nokia
• BiNPDA’s Signer
• HelloOX2

Procedure To Obtain Certificate And Key For Your Phone

• Create an account on OPDA.
• Login to your account and click Apply Cer.
• Fill in the details (to get IMEI dial *#06# on your mobile).
• Click Submit Application.
• Now wait for at least 2 hours before your Certificate and Key are processed.
• After it is processed acquire them.

Procedure To Hack The Phone (With HelloOX2)

• Download and Install BiNPDA’s Signer in your Memory Card.
• Copy the Certificate , Key and the HelloOX2 to any folder inside the memory card.
• Open BiNPDA’s Signer in the mobile.
• Click Options>Settings.
• In the settings fill in the Cert and Key by browsing to their location on the mem card.
• Also add HelloOX2.
• Click Options>Sign SIS>Go.

Procedure To Hack Phone (Without HelloOX2)

• Same as above till the 5th Step.
• Select Add Task.
• Browse for the Application to be signed.
• Select Options > Add.
• From the Menu select Sign SIS.
• Click Options then Go.

Note:The Signed application will be in the same location as that of the unsigned with a ‘ _‘  letter.