A lot of people have been looking for Huawei Y360-U31 stock firmware package for a long while without success finding it. Well, if you're one, here it ends your search.
This firmware has been tested to be working just fine after being flashed on a Huawei y360-u31.
This is an official firmware from Huawei and has no password protection. Just download and follow the flashing guide at the end of this post to flash the firmware.
Firmware download link
Update - 2/10/2016
If you get an update error message on your device while trying to use this firmware,
click here to download and flash the latest firmware update file.
Error instance:
How to flash
To flash this firmware on your Huawei Y360-U31 Android phone, please read and follow the easy firmware flashing guide
provided here carefully.
http://littlebitjohnny.blogspot.com /2016/07/how-to-flash-huawei-updateapp-stock.html" target="_blank">Click here.