Preparing tools:
How to Downgrade Lollipop to KitKat Asus Zenfone 6
- Turn first MTP (Settings => Storage => Tap the USB icon beside right corner => Enable MTP). Then connect Zenfone 6 to PC with USB cable.
- Move the downgrade V6.3.3.3 OTA file which you have downloaded into the internal memory zenfone 6
- Disconnect the USB cable, and then will pop up / notification concerning information system upgrades.
- After the process is complete, zenfone 6 will reboot automatically and do a factory reset.
- Reconnect zenfone 6 to the PC using USB cable.
- Then move the file OTA, downgrade V6.2.2.2 that you have downloaded into the internal memory zenfone 6.
- After the process, downgrade is completed, zenfone 6 will return to an automatic reboot and perform a factory reset.
- to ensure process downgrade successfully. Please check the version firmware zenfone 6 by going to Settings => About => Software Information => Build Number. If successful zenfone firmware version you should turn into V2.21.40.39 version.
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How to downgrade lollipop to kitkat on zenfone 6 A600CG / A601CG
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