| Hardware and OS | Asus Zenfone Max (M1) | Oppo A3s |
| Operating system | Android 7.1 (Nougat) | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Quad-core 1.4 GHz Cortex-A53 or Octa-core 1.4 GHz Cortex-A53 | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Adreno 308 or Adreno 505 | Adreno 506 |
| RAM | 2GB / 3GB | |
| Internal memory | | 16 GB, 2 GB RAM |
| Internal Storage | 16GB / 32GB | |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Memory Card Slot | microSD, up to 256 GB (dedicated slot) | |
| User Interface | Yes, ZenUI 5.0 | |
| Display | Asus Zenfone Max (M1) | Oppo A3s |
| Type | IPS LCD capacitive touchscreen | IPS LCD |
| Size | 5.5 inches, 88.1 cm2 | 6.2" inc |
| Resolution | 720 x 1440 pixels, 16:10 ratio | 720 x 1520 px |
| Touchscreen | Yes, up to 5 fingers | capacitive touchscreen |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | ~245 ppi density | 271 PPI |
| Protection | Not Included | |
| Colors | 16M Colors | 16M |
| Features | IPS LCD capacitive touchscreen, 16M colors, 5.5 inches, 88.1 cm2 (~84.4% screen-to-body ratio), 720 x 1440 pixels, 16:10 ratio , (~245 ppi density), Up to 5 fingers Multitouch | |
| Connectivity | Asus Zenfone Max (M1) | Oppo A3s |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE | LTE |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| NFC | No | |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | | 4.2, A2DP, LE |
| SIM | Nano SIM | |
| Edge | | Yes |
| Dual SIM | Nano-SIM, dual stand-by | |
| GPRS | | Yes |
| GPS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS |
| Speed | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | microUSB 2.0 | microUSB 2.0, USB On-The-Go |
| Camera | Asus Zenfone Max (M1) | Oppo A3s |
| Image | 720 x 1440 pixels | |
| Main camera | Dual: 13 MP (f/2.0), 8 MP (17mm, no AF), gyro EIS, phase detection autofocus, LED flash | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, AF
-2 MP, f/2.4, depth sensor |
| Features | Yes with LED Flash | LED flash, HDR, panorama |
| Video | | 1080p@30fps |
| Selfie camera | 8 MP (f/2.2, 25mm), gyro EIS | 8 MP, Single |
| Multimedia | Asus Zenfone Max (M1) | Oppo A3s |
| Loudspeaker | Yes | |
| Video Out | Not Support | |
| Ring Tones | MP3, WAV ringtones | |
| 3.5 mm Jack | yes | Yes |
| Radio | Yes Support FM Radio | FM radio |
| Design | Asus Zenfone Max (M1) | Oppo A3s |
| Colors | | Red, Dark Purple |
| Dimensions | 147.3 x 70.9 x 8.7 mm (5.80 x 2.79 x 0.34 in) | 156.2 x 75.6 x 8.2 mm |
| Weight | 150 g (5.29 oz) | 168 g |
| Battery | Asus Zenfone Max (M1) | Oppo A3s |
| Capacity | 4000 mAh battery | |
| Placement | Non-Removable | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | Asus Zenfone Max (M1) | Oppo A3s |
| Release date | | 2018, July |
| Sensors | Fingerprint (rear-mounted), accelerometer, proximity, compass | Accelerometer, proximity, compass |
