[Oukitel (All phone models)] mightymaki:
I can give you a quick how to, however you will need to do what I did & spend a little time yourself on google doing some research as well. Below is a very rough guide.

Anything

you do is at your own risk

If you don't know what you're doing THEN DON'T DO IT & DON'T ASK ME TO FIX OR HELP WITH YOUR MISTAKE. I have tried to repeat all of the steps I took below. I made a few mistakes but all that happened was not being able to unlock the bootloader & wiping my data. If you get stuck at any stage in the fastboot mode, just hold the power button down until it switched itself off & then reboot back into fastboot to begin again.

There is a simple guide here https://wiki.cyanogenmod.org/w/Template:Recovery_install_fastboot. Follow from step 6 &

here http://www.androidheat.com/install-clockworkmod-recovery-android/. these are what I followed

Whatever drivers you need (adb & fastboot) should be installed already.

Download supersu (or other) zip file & copy on to your sd card

Do a backup of everything as this will wipe

everything

if you want to save anything

Check " oem bootloader unlock" in developer mode & power off phone

Download cwm above & place into a folder if you haven't already done this.

Open this folder then run/open a cmd prompt as an administrator from within

Boot into fastboot by holding vol+ & power. Scroll through with volume button "up" & confirm fastboot mode with volume "down"

Plug usb into phone & check it is recognised by typing "fastboot devices" into the cmd. It should show with the serial number (something like 123456789) if recognised. If not then go back & install the drivers.

In cmd type "fastboot oem unlock" . You will get a warning message on your screen asking whether to unlock, voids warranty etc. You now decide whether to say yes or not. REMEMBER THAT THIS WILL WIPE ALL DATA ON THE PHONE, SAME AS A FACTORY RESET. You may have to tap the vol+ a few times (I did have to on mine) before it goes back to the fastboot screen.

Now, in the cmd window type the command "fastboot flash recovery recovery_oukitel_u8.img" (which is ghost54's cwm recovery) & hit enter (yes you do type in recovery twice!)

If all goes as it should, then it will be confirmed in the cmd window. If you get a fail message, then you haven't unlocked the bootloader & will have to go back & repeat the steps.

Now type into the cmd window the following command "fastboot boot recovery_oukitel_u8.img". This should then reboot the phone into the CWM recovery (might take a few seconds)

Now scroll through & wipe cache

Install supersu zip from sd card, wipe cache & dalvik

Reboot phone. As it has been wiped it will take a few minutes to boot up, DON'T PANIC!!

You now have a rooted phone with a cwm recovery. I was able to download the latest FOTA upgrade & then install this through the cwm recovery without a problem, so this is a bonus as we will receive all upgrades & can still install on the rooted phone, unlike before.

Again, only do this if you know what you're doing. Hopefully this will be of help to those of you that have been trying to root this phone since the first upgrade

Thank you to kadett1 & those that put the guides I have linked to above as well

Update: - I've just upgraded to V17. The above method still works to root the phone however I couldn't boot back into recovery using the cmd window. No problem though - just power off phone, hold vol+ & power back into fastboot mode, toggle to recovery with vol+ & press vol- to confirm. This will then bring you to the installed cwm & install supersu as above.