Step 1:
Install j.a.f and run it through Pkey, connect your phone, goto “BB5” tab, tick “read pp” button and click service button.
Now you will obtain the pp file of your phone,save it anywhere on your computer, open the pp file that you just obtained with any text editors such as notepad, word-pad, or notepad++.
For s40 v3 phones change the value of 28th line to 2 from 1,that is “28 2″
For s40 v5 and v6 phones change the value of 48th line to 2,that is “48 2″
Some phones show only three fields on their pp file,in that case just add 48 2 below set 1 like this
Step 2:
Tick upload pp and click service button,your phone will now go into test mode,a pop window will appear,browse to the edited pp file location and select it, J.A.F will upload pp file to your phone,finally the phone restarts.That’s it now you have hacked your phones security.
Multitasking
After you hacked your phone’s security take the application you want to minimize ,extract that jar file to a folder then modify “manifest.mf” file of the jar file, you can find it inside the manifest folder,and add the following code at very last line of the manifest.mf file,
Nokia-MIDlet-no-exit: True