I am still rocking with my Tecno p3. I just rooted it now. Check the following steps to root yours. Tecno N3 and T3 have also been successfully rooted using this process
*Download Poot . OR type this link in your web browser https://www.dropbox.com/s/r1ys5z0ocfnyynb/Poot-debug-tecno%20n3.apk
*Click on poot and install, after installing , go to the icon and click on it.
* It will ask you to download Minstro II, allow it to download from google play store. You must have logged in a gmail account in your phone to be able to access play store.