Please Do carefully We are Not Responsible for any Damage, bootloop or dead SD card’s. Asus Zenfone Max Pro M2 Smartphone is Run on android 8.1 OS Which is Powered by a QCOM Snapdragon 660 Processor. The Asus Zenfone Max Pro M2 is a dual SIM (GSM and GSM) smartphone that accepts Nano-SIM and Nano-SIM. Connectivity options include Wi-Fi, GPS, Bluetooth, NFC, USB OTG, FM, 3G and 4G. Also if you feel your Asus Zenfone Max M2 ZB633KL lag or has an issue, then flash the stock firmware from the list below and save from situation.