In order to install N-Gage client on your Symbian s60 5th edition mobile you need to first follow the steps in my previous post on hacking the mobile. Then Continue:

Download RomPatcherPlus_3.1.sisx on your mobile.

Launch it.

Enable all patches and exit.

Download and install N-Gage client.

Download and install any N-Gage game – like Asphalt 3 N-Gage.

To play the game:

First launch Rompatcher and disable all patches(else game will not work)

Launch the game and play!

After playing exit the game and re-enable all the patches.

Cheers!

Here is a simple tutorial to hack any Symbian s60 3rd of 5th edition mobile which makes it possible to install ANY unsigned app. This method is very simple and doesnt require a PC. After the hack N-Gage 2.0 application can be installed on ANY 5th edition mobile. (Tested successfully on my Nokia C 5 with Asphalt 3 N-Gage game).

• Download UMUNokiaHack.sisx
• Download RomPatcherPlus_3.1.sisx
• Download InstallServers_Pack.Zip
• Download X-plore_s60_3rd_1_53.sisx
• Depending on whether you’re using a Nokia or Sony ericsson symbian phone, download UMUNokiaHack or UMUSonyEricsson Hack and install. Launch the application.
• Select your desired connection type.
• Accept the trial key and accept the trial license.
• Trial KEY: UMUMS30D-TRIAL
• Select Yes
• Next, select No, then OK
• Select OK and press 123. Now re-type 123 once more
• Choose Options and click on Antivirus (updating anti-virus not necessary)
• Select Quarantine.
• Press Options > Restore > Yes
• Click Back, Home, then Exit and uninstall UMU Mobile Security immediately.
• Enter 123 when prompted.
• Now install RomPatcherPlus_3.1.sisx
• Launch it and apply Open4All. This gives you access to all folders including system folders
• Apply Installserver. Now you can install all unsigned applications.(With X-plore or any other file manager you have, copy the installserver to to C:\sys\bin)

Note: To know which version of Symbian is installed visit www.gsmarena.com.

InstallServer versions:
installserver91: for E60, E61i, E62, E65, E70, N71, N73, N75, N77, N80, N91, N91, N92(Symbian 9.1)
installserver92: for E51, E90, N76, N81, N81 8GB, N82, N93, N93i, N95, N95-2, 6290, 5700, 6120, 6110, i520, i550, i400, i450, i560, G810, N78, N96, 6220(Symbian 9.2, 9.3)
installserver3250: for 3250
installserver5500: for 5500
installservere50: for E50
installservere61: for Е61 or 3250 (if first file wont work only)

Tested successfully on my Nokia C 5-00

Bonus: Asphalt 3 N-Gage (works fine after hacking)