How to Downgrade
Step 1: This tutorial assumes that you have Ascend P7 (L10) running B805 Android 5.1.1 Lollipop beta firmware with stock recovery.
Step 2: Download the B800 transition firmware from above extract it. In addition to this, download the B609 KitKat firmware from here and extract its Update.app file too.
Step 3: Create a backup of your existing data using the inbuilt backup app. You may have to use that backup later.
Step 4: Copy B800’s Update.app file to the “dload” folder of the external SD card. Install this package from Settings > Updates > Menu > Local Update. Your reboot will reboot and install this transition firmware.
Step 5: When your phone starts up, you need to verify that its build number is now B800.
Step 6: Now copy B609’s Update.app package to the same dload folder. Make sure you delete the previous Update.app first.
Step 7: Finally, install B609 from Local Update. This firmware will take a little longer time to install as compared to B800. Upon completion it’ll automatically reboot.
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