How to unroot a Mediatek Android phone in order to successfully install an OTA update

It does feel good to see an Over The Air (OTA)
update from your Original Equipment
Manufacturer (OEM), especially when its a leap
from one major version of Android to another. In
a haste to update, some device users end up
encountering errors or even bricking their phones
while trying to install OTA updates on rooted
devices; causing the phones in question to
always boot straight into recovery mode. In such
a situation, a factory reset doesn’t help in any
way. We did provide a fix for this at https://
forum.hovatek.com/thread-5517.html but today’s
guide is focused on prevention.
Why do I need to unroot before I can install an

OTA update?
OTA updates are signed. This means the Android
system checks the integrity of core partitions
before proceeding with installation of the OTA
zip file. What this means is that if you have
somehow altered these core partitions, you will
likely encounter an error or end up with a bricked
Android phone .
What exactly am I trying to achieve by
unrooting?
You are simply trying to return your boot,
recovery and system partitions to their original
states so they can pass the System test (Root
Integrity check).
How do I perform a Root Integrity check?
Boot into Stock recovery mode (see https://
forum.hovatek.com/thread-479.html )
In Stock recovery, select Root Integrity check
and wait for the result
Why isn’t the unroot option in my SuperSU or
Kinguser the best option for me?
We’ve had a number of bricked phones due to
opting for this method of unrooting. Your /system
partition has already been modified / patched so
you’re still exposed to the possibility of an
incompatibility with the OTA zip file since the
Super User unroot option does not completely
cover its trail.
How do I unroot an MTK phone before flashing
an OTA update?
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You will be reverting the boot, recovery and
system partitions because they are core and are
commonly altered in order to root or after
rooting. To unroot your MTK Android phone
ahead of an OTA update:
Download the firmware for your phone model
from https://forum.hovatek.com/
forum-89.html
Extract the content into a folder using any
zip / rar file manager of your choice (e.g 7zip,
Winrar, B1 Archiver etc)
Install VCOM drivers on your PC using https://
forum.hovatek.com/thread-440.html
Flash only recovery, boot and system
(Android) using SP flash tool at https://
forum.hovatek.com/thread-159.html . Untick
the rest and ensure to use the Download only
option
If you wish to flash the entire firmware then
use the Firmware upgrade option or Infinix
Flash tool at https://forum.hovatek.com/
thread-9224.html
Wait till flashing is complete and you get a
green OK prompt ( Do not interrupt SP flash
tool or Infinix flash tool while flashing )
Disconnect the phone then boot it up
Will I lose my data after unrooting using this
method?
If you flash only recovery, boot and system
(Android) then your data will not be affected. If -
on the other hand- you flash the entire firmware
then you will lose your data. To backup your
important contacts, SMS etc, follow the guide
at https://blog.hovatek.com/backup-your-
android-apps-sms-contacts-call-logs-calendars-
and-bookmarks-using-super-backup/