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Brief information about compared phones: Allview Viper E , Oppo A31Allview Viper E 2014 year of release. cpu Quad-core 1.3 GHz Cortex-A7. screen 4.5". with resolution 480x854. Smartphone has 2 megapixel front camera and 8 megapixel main camera . Oppo A31 2020 year of release. cpu Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53). screen 6.5". with resolution 720x1600. Smartphone has 8 megapixel front camera and 12 megapixel main camera . |
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| Display | Technology | IPS LCD | IPS LCD | |
| Touchscreen | capacitive touchscreen | capacitive touchscreen | ||
| Display colors | Super AMOLED | 16M | ||
| Screen size | 4.5" inch | 6.5" inch | ||
| Screen area | 55.8 cm2 | 102.0 cm2 | ||
| Screen format | 16:9 (height:width) | 20:9 (height:width) | ||
| Screen to body ratio | 127.3 Х 65.5 Х 10 mm | 82.4% | ||
| Screen resolution | 480 x 854 px | 720 x 1600 px | ||
| PPI /points per inch/ | 218 PPI | 270 PPI | ||
| Screen protection | Asahi Dragontrail Glass | |||
| Camera and Video | Rear camera, main | 8 MP, Single | 12 MP, Triple | |
| Camera specs | 8 MP, AF | 12 MP, f/1.8, (wide), PDAF -2 MP, f/2.4, 27mm (macro), 1/5.0'', 1.75µm -2 MP, (depth) | ||
| Functions | Dual-LED flash, HDR | HDR | ||
| Video | 1080p@30fps | 1080p@30fps | ||
| Front camera, selfie | 2 MP, Single | 8 MP, Single | ||
| Specifications | 2 MP | 8 MP, f/2.0 | ||
| Performance | Operating system OS | Android 5.0 (Lollipop) | Android 9.0 (Pie); ColorOS 6.1 | |
| Chipset | Mediatek MT6582 (28 nm) | Mediatek MT6765V/CB Helio P35 (12nm) | ||
| Processor CPU | Quad-core 1.3 GHz Cortex-A7 | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) | ||
| Graphics processor GPU | Mali-400MP2 Z525 -Mali-T720MP2 Z528 | PowerVR GE8320 | ||
| External memory | microSD, up to 32 GB (dedicated slot) | microSDXC (dedicated slot) | ||
| Internal memory | 8 GB, 1 GB RAM | 128GB 4GB RAM | ||
| Antutu 8 score | 105221 | |||
| General specs | Release date | 2014, September | 2020, February 13 | |
| Dimensions (HxWxD) | 131 Х 65 Х 7.8 mm | 163.9 Х 75.5 Х 8.3 mm | ||
| Weight | 122.5 g | 180 g | ||
| Colors | Black, White | Fantasy White, Mystery Black | ||
| Battery | 1800 mAh, Removable Li-Ion | 4230 mAh, Non-removable Li-Po | ||
| Approximate price | 180 EUR | |||
| Battery life | Stand by time- Up to 225 h Talking time- Up to 9 h 15 min | |||
| Body build | Glass front, plastic back, plastic frame | |||
| Communication and Connectivity | SIM card | Single SIM (Micro-SIM)Dual SIM (Micro-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) | |
| Network | Show all network frequencies: -2G - GSM 900 / 1800 / 1900 - SIM 1 & SIM 2-3G - HSDPA 900 / 2100-4G - LTE band 1(2100) | Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 2100 -4G - LTE (unspecified) | ||
| Speed | HSPA 21.1/5.76 Mbps | HSPA 42.2/5.76 Mbps, LTE-A | ||
| GPRS | Class 12 | Yes | ||
| Edge | Class 10 | Yes | ||
| Wi-Fi | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | ||
| GPS | Yes, with A-GPS | Yes, with A-GPS, BDS | ||
| NFC | Super AMOLED | |||
| USB | microUSB 2.0 | microUSB 2.0, USB On-The-Go | ||
| Bluetooth | 4.0, A2DP, EDR | 5.0, A2DP, LE | ||
| Harmful irradiation | SAR EU - 0.84 W/kg (head) 1.24 W/kg (body) | |||
| Music and Audio | Radio | FM radio | FM radio | |
| Headphone jack | Yes | Yes | ||
| Others | DTS sound -Yamaha amplifier | 480 nits typ. brightness | ||
| Other features | Dop | Sensors Accelerometer, proximity, compass | Sensors Fingerprint (rear-mounted), accelerometer, proximity, compass | |
