Use APKPure App
Get Update Android 6 old version APK for Android
इस आवेदन के साथ आप Android संस्करण 6 को अपने निहित डिवाइस अद्यतन कर सकते हैं।
This application allow you to update your rooted device to Android version 6.0.
This application requires root permission.
This application detects your device specifications and update it to a new version of OS firmware.
Try it... :)