Tested, work on official and updated rom. If you re-flash the official rom, it will be replaced with standard recovery. Just reflash it again with the instruction below.
How to install:
1. Download Mobileuncle mtk tools from playstore.
2. Download the recovery image from the link above, copy it you your SD card/internal storage.
3. Open Mobileuncle, select "Recovery Update."
4. Select the recovery image, it should be on top of the list.
5. Select "OK" when some warning pop up (Are sure flash recovery! <– what kind of english is this )
-> to go to recovery mode you could chose "Into Recovery Mode" in Mobileuncle, instead of shutting down and holding the power and volume button.
Use up and down volume button to navigate, back button to go back, and power button to execute.