First download HelloOX2.v2.03.Unsigned.sis from the link below:
Now you need to sign HelloOX2.v2.03.Unsigned.sis
or If you dont want to try to signed the unsigned version (its just for your experience) you need to download this signed version here:
After signing HelloOX2, install it on your phone.
After installing, HelloOx will appear in application folder.
Open HelloOx and it will run automatically. You can see it will show "Installing Rompatcher"
And last, you will see "Eveything done,...", select Ok and now you can see Rompatcher beside HelloOx.
Now after installing rompatcher if your phone is FP1 phone then congrats your phone is hacked! and if your phone is not a FP1 phone then continue towards the next step. You can see the list of FP1 Phones Here:
PRE-FP1
Nokia N77, Nokia E61i, Nokia E65, Nokia N93i, Nokia N91 8GB, Nokia E62, Nokia E50, Nokia 5500, Nokia N93, Nokia N73, Nokia N80, Nokia N71, Nokia N92, Nokia E70, Nokia E60, Nokia E61, Nokia 3250
FP1
Nokia N82, Nokia N95-3 NAM, Nokia E51, Nokia N95 8GB, Nokia N81, Nokia N81 8GB, Nokia 6121 classic, Nokia 6120 classic, Nokia 5700 XpressMusic, Nokia 6110 Navigator, Nokia E90 Communicator, Nokia N76, Nokia 6290, Nokia N95
So, got a FP2 phone open Rompatcher and you can see two patches Installserver_FP2 and open4all. Select options, then highlight All patches and select Apply.
Last step, Highlight installserver_FP2 then press options, select Add to auto.
All Done! Now your phone is hacked. You can install all unsigned applications without "certificate error".