Welcome all Huawei Acend G300 users, this is a full guide prepared by me which will help you unlock your bootloader and not only that but it will help you gain root access for system modifications and root required applications.
Lets get started shall we? Firstly I have gathered up some useful resources that will help you get started. Make sure you read this guide first, from top to bottom. Then continue. As you must have a clear understanding on what you are going to attempt. If you have any queries don't hesitate to ask on the thread itself.
Okay, first of all you will need to download Unlockbootloader ---> Attachment 1279054
Once you have downloaded the said .zip extract the .exe file inside the .zip to your desktop.
Continue by turning on USB debugging on your G300. if its already switched on then skip the part below..
Go into Settings>Developer Options and tick the USB Debugging option.
Once its switched on, plug your phone to the computer using a USB cable.
So far you've downloaded Unlockbootloader, have switched USB debugging on, and your phone is connected to your PC.
Now run the .exe file you have just extracted. Click "Root" and let it do everything, it will prompt up with a few warnings saying don't use your keyboard because CMD is running.
Once the setup finishes, your phone should be rooted.
Head into the app drawer, and if you see "SuperUser" you're now officially rooted.
Reboot your phone to finalize the rooting and exploits.
Ok, now for the bootloader.
Once your phone is on, and connected again to the PC with debugging mode on, run the .exe file again and this time click "Unlock BootLoader".
Wait for it to do its job, once done reboot again and you now have a Stock Rooted and Bootloader unlocked ICS phone.