| Local Name | Zenfone 3s Max ZC521TL |
| Technology | GSM / HSPA / LTE |
| 4G Bands | 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 38, 41 - Taiwan | 1, 3, 5, 8, 40 - India |
| 3G Bands | HSDPA 850 / 900 / 1900 / 2100 - Global | HSDPA 850 / 900 / 2100 - India |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| Speed | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Announced | 2017, January |
| Status | Available. Released 2017, February |
| Dimensions | 149.5 x 73.7 x 8.9 mm (5.89 x 2.90 x 0.35 in) |
| Weight | 175 g (5.22 oz) |
| SIM | Hybrid Dual SIM (Micro-SIM/Nano-SIM, dual stand-by) |
| Display Type | IPS LCD capacitive touchscreen, 16M colors |
| Screen Size | 5.2 inches, 74.5 cm2 (~67.7% screen-to-body ratio) |
| Resolution | 720 x 1280 pixels, 16:9 ratio (~282 ppi density) |
| OS | Android 7 (Nougat); ZenUI 3 |
| Chipset | Mediatek MT6750 (28 nm) |
| CPU | Octa-core (4x1.5 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53) |
| GPU | Mali-T860MP2 |
| Card Slot | microSDXC (uses shared SIM slot) |
| Internal Memory | 32GB 3GB RAM | eMMC 5.1 |
| Camera Features | Dual-LED dual-tone flash, panorama, HDR |
| Video | 1080p@30fps |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| Bluetooth | 4.0, A2DP, EDR |
| GPS | Yes, with A-GPS, GLONASS, BDS |
| Radio | FM radio |
| USB | microUSB 2.0, USB On-The-Go |
| Sensors | Fingerprint (front-mounted), accelerometer, gyro, proximity, compass |
| Battery | Non-removable Li-Po 5000 mAh battery |
| Stand By | Up to 816 h (3G) |
| Talk Time | Up to 28 h (3G) |
| Colors | Gold, Black |
