GOOD NEWS, guys, after our effor, the G910 Bluetooth Game controller finally support MTK smartphones and tablet!
Now you can use G910 game controller to enjoy the great gaming experience on your MTK device. Here is the instructions:
What do you need:
1 One Rooted MTK smartphone; (You must root your device first to use it. how to root your mtk smartphone, we have a lot of instruction in our blog, just search as your model name)
2 One G910 Bluetooth Controller with lastest firmware, here is the instruction for how to get the latest firmware on G910 :
If you have problem when you do the upgrade, you can see the instruction here
3 Install the Newest game center here:
also you need to install the app in the post called OpenPad Union.
Now follow this instruction:
1 Turn on bluetooth function in your MTK smartphone;
2 Press Y + Home button on your G910 Game controller; now there will be 3 led flash in controller;
3 Go to your smartphone bluetooth setting, search new device, and find this g910 game controller, and pair with it. (please notice, the 3 led light will still flash even you pair with your smartphone, don’t worry about this)
4 Open the “openpad union” app in your smartphone, and then click the PLUS button in the following photo,
the app will help to search for the G910 game controller, once find it, you just need to click it, and then it will help to match with G910 game controller. after connect, you will see the following on your smartphones.and on your G910, you will just only the third led is light.
Now your smartphone is finally connected with your G910 game controller, and you can try to play “Dead Triggle” to test 
Enjoy!
Eric
Geekbuying