Huawei started seeding the B310 Android 5.1 Lollipop update to the Russian Honor 4X a couple of days ago via OTA. You can now download its full Update.app firmware image and flash it over any KitKat version you want.
Download Honor 4X (L11) B330 Lollipop Firmware Update [Asia Pacific]
Huawei is rolling out the C636B330 Android 5.1 Lollipop update for its Honor 4X Che2-L11 in several Asian Pacific regions including Hong Kong, Bangladesh, Nepal, Philippines and Laos. You can download this update’s full firmware package here.
Download Honor 4X (L11) B310 Android 5.1 Lollipop OTA [Russia]
The Russian Huawei Honor 4X (Che2-L11) is also receiving the much-awaited B310 Lollipop update (EMUI 3.1) via OTA. You can download this update’s Zip package here and install it over your existing KitKat system.
Huawei Honor 4X (L11) B302 Lollipop EMUI 3.1 Beta Update [Official]
Huawei Honor 4X (Che2-L11) can now be updated to B302 Android 5.1 Lollipop beta based on Emotion UI 3.0 through the official firmware released by Huawei in Malaysia.