The Asus Zenfone Max Pro (M2) ZB631KL is a 2018 Android 8.1 smartphone powered by the Qualcomm SDM660 Snapdragon 660 (14 nm) with 3GB | 4GB | 6GB and 128GB | 32GB | 64GB internal storage. It features a 6.3", IPS LCD, 1080.0x2280.0 display and is available in Blue, Titanium.

The Zenfone Max Pro (M2) ZB631KL is equipped with a Li-Po 5000 mAh, non-removable, a 12 MP, 4K@30fps, 1080p@30/60fps, gyro-EIS main camera, a 13 MP, 1080p@30fps front camera. The device uses a Nano-SIM + Nano-SIM configuration. It weighs 175 g.

A bootloop on the Asus Zenfone Max Pro (M2) ZB631KL occurs when the device repeatedly restarts without fully loading Android. This is commonly caused by a failed software update, corrupted system files, or an incompatible app. Most bootloops can be resolved without losing data by clearing the cache partition first before attempting a factory reset.

Factory reset may be needed as a last resort — erases all data.