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Install Unsigned application software in Nokia Nseries phones like N73,N890,N95,N82,N77,N78,N75,N96,N93 etc.

You will get many unsigned Symbian applications from internet ,but it may not be possible to get installed in your phone. Because prior you install unsigned applications you should get them signed from Symbiansigned.com & seems a laborious process . I will tell you how to install these "Unsigned" releases, by following through a one-time procedure.

First step is to runrun "SecMan.exe" (included in this download).
The program allows you to install our future "Unsigned" releases, without signing them every time.

Then you will need to have TRK (included in thisdownlaod) installed, and connected to your pc via USB connection.
s60_3_0_app_trk_2_8_6.sisx for SymbianOS9 devices WITHOUT FP1
s60_3_1_app_trk_2_8_6.sisx for SymbianOS9 devices WITH FP1

For installing this application first connect your phone PC suite mode.
On the phone, run the TRK app, in applications folder.
When it asks for a bluetooth connection, don't turn it on, and change connection settings to USB.
After you have done that, click "Next" and follow the instructions on screen.

When the installation is done, look in the Applications folder on your phone, and find SecMan.

Open it, and click on "Install Root Certificate".

After this is done, you will be able to install our future "Unsigned" releases like normal "Signed" applications.

You please Please keep in mind, if you format / upgrade your phones firmware, you'll need to do this step again and after that manually install those apps from Application Manager.