This is the shortest tutorial i have ever seen on Rooting your Tecno N7 Device 
Rooting your Phone means obtaining superuser rights and permissions to
your Android's software.
With these elevated user privileges, you gain the ability to load
custom software (ROM's), install custom themes, increase performance,
increase battery life, and the ability to install software that would
otherwise cost extra money
For This Tutorial, The following Requirements are needed.
** A Computer
** The Device you want to Root.
** UnlockRoot
** A USB to connect your Device and Computer
Steps
Step 1: Download and install unlockroot on your computer.
Step 2: Plugin your usb or data cable to both your Tecno N7 phone and computer.
Step 3: Put your phone in USB DEBUGGING MODE. (Enable it By going to
Settings > Applications > Development > USB debugging and tick the USB
debugging option)
Step 4: Open unlock root on your pc and select your phone (Tecno N7)
Reboot your android device. Congratulation your Tecno N7 is now rooted
To check if your device has been successfully rooted. Just follow this Steps:
Download Root Check from Google Play Store. Install and Run It into
your device, press the 'Verify Root' button. If it asks for
permission, Press 'Grant'. If you device has been
Rootes, You will get a Message as This: 'Congratulations! Your
device has a root access'