Huawei Ascend Y330. A smartphone that should deserve its own section in this forum, given the fact it is a very good choice for its features at an affordable price. It is sold like hot bread in my country (Romania) and some mobile operators even asked Huawei to customize these phones for them with a starting / stopping animated logo and sound.

I tried to root it using KingRoot. No success (rooting failed).
Then I tried using KingoRoot (yes, an extra 'o' in the name, why so similar??). Again no luck.

I chose these 2 methods because they offer UNROOTING too. That is a must for me in case I need to repair it.

What else should I try? My final plan is to install a custom ROM, much smaller than the original one that 'eats' almost 2 GB!! For a Linux clone, that is a total disgrace!

If I look in Settings/About Phone, I see this:

Android version: 4.2.2
Kernel version: 3.4.5
Build number: Y330-U01 V100R001C00B136
Custom build: CUSTROUC150D001