Infinix face unlock is now available for your device, the new OTA update will add the face unlock feature to your Infinix Hot S3, below is a well explained method to upgrade and active the infinix face id
How to Upgrade Infinix Note 4
Note : before you upgrade your mobile phone
Make sure your infinix Note 4 is not rooted
Ensure your phone battery is atleast 95% charged( do not be in a rush to update)
Back up of your current firmware should in case the need arise to downgrade your device if the update contains bugs.
Ensure you have atleast 400MB of data.
The update is around 332MB in size
How to Upgrade Infinix Hot S3
Go to your phone settings
Check for latest update.
If its available, tap on “Download And Install” to download the update on your phone.
Relax and wait for the new update to fully install. After successful installation, your phone will be rebooted and new feature will be visible.
How To Activate Infinix Mobile Face Lock / Unlock Feature
To activate the feature, you need to go into Settings > Security > Location > Face ID. From the menu, tap on Set up lock screen passcode and choose from PIN, Password, and Pattern. Once done, tap Continue, tap Yes, and then select Add Face ID. After a complete scan is done, the phone will display Face ID successfully enrolled. To check, lock your phone, press the power button, and align your face to unlock it.