The Asus Zenfone 3s Max ZC521TL was announced in 2017, January With 5.2 inches, 74.5 cm2 (~67.7% screen-to-body ratio) IPS LCD, Powered by Mediatek MT6750 (28 nm) and running Android 7 (Nougat), ZenUI 3, the device delivered smooth performance and multitasking capabilities. Its 13 MP, f/2.0, AF rear camera captured crisp photos and 1080p@30fps video, while the Li-Po 5000 mAh, non-removable ensured long-lasting usage.