How to flash an official update on your Huawei U9508
(Ascend G615 / Honor2)

First thing is download the official update, the latest EMUI update is here
Take care, there is entire update , that usually is bigger than 400MB, and incremental update, usually a 35-40 MB file size (these need previous update already installed)
After download, open the archive and extract the 'dload' folder on the root of your SD card
Then you can flash the official update, but you need to have stock recovery installed on your phone

Take care : official update wipe data partition, so take a backup of your applications and data !
To install stock recovery, you must have:

• installed the Huawei USB driver
• enable the USB Debug checkbox in Developer Options
• Unable fastboot option on the phone

Then :

• plug-in the phone to pc (not in USB3 port, please!), the phone will be recognized
• Download the Custom Recovery Ascend Honor2 v6.0.19
• Run Recovery6.0.19_AscendHonor2.exe, insert 2 from keyboard then 'enter'
• The phone will reboot once or twice, don't panic !
• unplug and turn off the phone
• Hold on 'volume up' and 'power' button together to enter in recovery mode
• Now you will see Stock recovery
• Power off the phone

To flash the update, you must follows this steps:

• Power on the phone with power+volume down + volume up button pressed together
• you must enter on Huawei update tools, that install the update on dload folder
• Wai until you see OK (if you see FAIL, retry)
• Now reboot your phone
• You have now the official update that you prefer installed !