Oppo A91 vs Oppo A31
Comparing 2 products
| General Overview | ||
| Device Type | Bar | Bar |
| Model | PCPM00 | CPH2015 |
| Announced | 2019, December | 2020, February |
| Released | 2019, December | 2020, February |
| Status | Available | Available |
| Design | ||
| Type | Bar | Bar |
| Dimensions | 7.9 mm thickness | 163.9 x 75.5 x 8.3 mm (6.45 x 2.97 x 0.33 in) |
| Weight | 172 g (6.07 oz) | 180 g (6.35 oz) |
| Colors | Dark Blue, Red, Blue | Fantasy White, Mystery Black |
| Protection | - | Glass front, plastic back, plastic frame |
| Network | ||
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) | LTE (unspecified) |
| SIM | Nano SIM | Nano SIM |
| Dual SIM | Yes, Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) |
| Display | ||
| Display Type | AMOLED | IPS LCD |
| Size | 6.4 inches, 98.9 cm2 | 6.5 inches, 102.0 cm2 (~82.4% screen-to-body ratio) |
| Resolution | 1080 x 2400 pixels | 720 x 1600 pixels |
| Display Colors | 16M colors | 16M colors |
| Pixel Density | 411 ppi density | 270 ppi density |
| Touch Screen | Capacitive Touchscreen | Capacitive Touchscreen |
| Features | - | 480 nits typ. brightness |
| Media | ||
| FM Radio | Yes | Yes |
| Earphone Jack | Yes | Yes |
| Camera | ||
| Camera Set | Quad Cameras | Triple Cameras |
| Main Camera | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF | 12 MP, f/1.8, (wide), PDAF |
| 2nd Camera | 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm | 2 MP, f/2.4, 27mm (macro), 1/5.0", 1.75µm |
| 3rd Camera | 2 MP, f/2.4, 1/5", 1.75µm (dedicated macro camera) | 2 MP, f/2.4, (depth) |
| 4th Camera | 2 MP, f/2.4, 1/5", 1.75µm, depth sensor | - |
| Camera Video | 2160p@30fps, 1080p@30fps | 1080p@30fps |
| Features | HDR, panorama | HDR, panorama |
| Flash | LED Flash | LED flash, |
| Selfie Set | Single Camera | Single Camera |
| Selfie Camera | 16 MP, f/2.0, 26mm (wide), 1/3.1", 1.0µm | 8 MP, f/2.0 |
| Selfie Video | 1080p@30fps | 1080p@30fps |
| Features | HDR | HDR |
| Software | ||
| OS | Android 9.0 (Pie) | Android 9.0 (Pie) |
| User Interface | ColorOS 6.1 | ColorOS 6.1 |
| Hardware | ||
| Chipset | Mediatek MT6771V Helio P70 (12nm) | Mediatek MT6765V/CB Helio P35 (12nm) |
| CPU | Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) |
| GPU | Mali-G72 MP3 | PowerVR GE8320 |
| RAM | 8 GB | 4 GB |
| Internal Storage | 128 GB | 128 GB (eMMC 5.1) |
| Card Slot | Yes, microSD, up to 256 GB (dedicated slot) | Yes, microSD, up to 256 GB |
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | Fingerprint (rear-mounted), accelerometer, proximity, compass |
| Connectivity | ||
| Bluetooth | 5.0, A2DP, LE, aptX HD | 5.0, A2DP, LE |
| Wi-fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Wi-fi Hotspot | Yes | Yes |
| USB | 2.0, Type-C 1.0 reversible connector, USB On-The-Go | microUSB 2.0, USB On-The-Go |
| GPS | Yes, with A-GPS | Yes, with A-GPS, BDS |
| NFC | No | No |
| Data | ||
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| Speed | HSPA 42.2/11.5 Mbps, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A |
| Battery | ||
| Battery Type | Li-Poly (Lithium Polymer) | Li-Poly (Lithium Polymer) |
| Capacity | 4025 mAh battery | 4230 mAh battery |
| Placement | Non-removable | Non-removable |
| Fast Charging | Yes, 30W: 50% in 30 min (VOOC Flash Charge 4.0) | - |
