Finally OTA has arrived for Infinix Note 2. No need to download the raw file and flash as reported days ago. You can automatically download it and upgrade your Infinix note 2 to Android 6.0 Marshmallow.
Please if you are rooted, kindly ignore this post, and check this http://samintegrity.blogspot.ae/2016/02/how-to-upgrade-infinix-note2-to.html?m=1 post to download full Infinix note2 Marshmallow or else it will bricked your device.
And make sure you have about 90% charge or connect your charger to your device before you download the OTA upgrade.
The OTA download is around 716MB