Thank you for your asking. The last firmware version of your model is WW-15.01.1810.262. Please backup your data and download the firmware file into the root directory, aka the outermost place, of the internal storage. Reboot. Then tap the system update notification.
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Hi morgunoffser
Thank you for your asking. The last firmware version of your model is WW-15.01.1810.262. Please backup your data and download the firmware file into the root directory, aka the outermost place, of the internal storage. Reboot. Then tap the system update notification.
https://www.asus.com/Phone/ZenFone-3-Max-ZC520TL/HelpDesk_BIOS/
#Update Guide
https://www.asus.com/support/FAQ/1009748/