Huawei Y635-L01 Lollipop?
Only available via custom ROMs, which you'll need quite a bit of research before diving into. Consider using this XDA-Developers thread for a start.

Note: As it is for all Huawei phones, you need to apply for unlocking the bootloader first. Furthermore, the page points out that you will only get 3.1MP camera at best with any Lollipop custom ROM, and you need a special modem for calls to work correctly.