Tweet
latest Android 7.1 Stock Rom from Asus ZenFone 4 Max ZC520KL. Can install the software with a memory card.
Throw the software to a free memory card formatted as fat32. Insert the memory card into the phone. Turn off the phone, wait 10 seconds, then turn the device on with power down and power down. Aplly Update Install the software by selecting the SD card.
Download