Builds starting with r1 work with MIUI, MIUI Pie Beta and custom roms based on LineageOS.
Builds starting with r5 are only for MIUI Pie and custom roms.
Flash the zip in your recovery
Auto-flash from FK Kernel Manager app, it's magical
Scroll down, choose your device & select the latest release to see the changelog.
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FK Kernel Manager video
Disclaimer to moderators:
Slight OT is fine, but when users decide to act stupid they should be dealt with with the appropriate means - its really annoying for me when OT turns crazy. Please put the warning/ban hammer anytime any of you think there's lack of respect and/or too much unwanted OT crap - but if it doesn't meet this criteria let the OT posts alone. Thank you.