im just thinking to make a thread (to make it easy to find) for those are looking the solution for Gr8 activation code.
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[SOLVE] Gr8 Activation Code For All Huawei Device
1) turn on the Huawei media pad/phone, unlock the screen
2) plug in to computer/laptop windows 7,8 or windows 10
3) on the Huawei media pad screen, it will pop up usb setting, select hiSuite usb type option
4) at the andoid setting, please go to about table setting, then enable developer mode by taping 7 times at Build number
5) still at android setting, go to security, make sure your android Screen lock setting is set under Huawei unlock,the go to shortcut setting, need to set to google app and android setting app.
6) install HiSuite to your computer - this is the Huawei official computer device managed software tool
7) install iRoot software to your computer. careful with this installation, it full of bloatware, but don't worry it don't have a virus.
8) run the iRoot and it will root your device. It will restart your Huawei pad multiple times.
9) after it root complete, unlock your device then go to google play ( as your android unlock setting option have the google play as describe in step 5)
10) install System app remover from google play
11) open the app, go to inside the app setting, remove setting Hide core system app
12) go to the main menu of the app remover, under manager, select system app, now you can find gr8 gallery app. Removed that app then restart the device.
13) you will have multiple error in android, just reboot and the error gone. DONE