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Brief information about compared phones: Celkon A87 , Oppo A8Celkon A87 2013 year of release. cpu 1.0 GHz. screen 4". with resolution 480x800. Smartphone has 0 megapixel front camera and 5 megapixel main camera . Oppo A8 2019 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 | ||
| Touchscreen | capacitive touchscreen | capacitive touchscreen | ||
| Display colors | 16M | |||
| Screen size | 4" inch | 6.5" inch | ||
| Screen area | 45.5 cm2 | 102.8 cm2 | ||
| Screen format | 5:3 (height:width) | 20:9 (height:width) | ||
| Screen to body ratio | % | 83.0% | ||
| Screen resolution | 480 x 800 px | 720 x 1600 px | ||
| PPI /points per inch/ | 233 PPI | 83 PPI | ||
| Camera and Video | Rear camera, main | 5 MP, Single | 12 MP, Triple | |
| Camera specs | 5 MP, AF | 12 MP, f/1.8, (wide), PDAF -2 MP, f/2.4, 27mm (macro), 1/5.0", 1.75µm -2 MP, 1.75µm, depth sensor | ||
| Functions | HDR | |||
| Video | Yes | 1080p@30fps | ||
| Front camera, selfie | 0.3 MP, Single | 8 MP, Single | ||
| Specifications | VGA | 8 MP, f/2.0 | ||
| Performance | Operating system OS | Android 2.3.6 (Gingerbread) | Android 9.0 (Pie); ColorOS 6.1 | |
| Chipset | Spreadtrum 6820 | Mediatek MT6765V/CB Helio P35 (12nm) | ||
| Processor CPU | 1.0 GHz | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) | ||
| Graphics processor GPU | PowerVR GE8320 | |||
| External memory | microSD, up to 32 GB (dedicated slot) | microSD, up to 256 GB (dedicated slot) | ||
| Internal memory | 512 MB, 512 MB RAM | 128GB 4GB RAM | ||
| Antutu 7 score | 86232 | |||
| General specs | Release date | 2013, January | 2019, December | |
| Dimensions (HxWxD) | Х Х mm | 163.9 Х 75.5 Х 8.3 mm | ||
| Weight | 0 g | 180 g | ||
| Colors | Black, White | Green, Black | ||
| Battery | 1450 mAh, Li-Ion | 4230 mAh, Non-removable Li-Po | ||
| Approximate price | 70 EUR | 150 EUR | ||
| Battery life | Stand by time- Up to 220 h Talking time- Up to 3 h | |||
| Body build | Glass front, plastic back, plastic frame | |||
| Communication and Connectivity | SIM card | Dual SIM (Mini-SIM) | Dual SIM (Nano-SIM, dual stand-by) | |
| Network | Show all network frequencies: | Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 900 / 2100 CDMA2000 1xEV-DO -4G - LTE band 1(2100), 3(1800), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) | ||
| Speed | HSPA 42.2/5.76 Mbps, LTE-A | |||
| GPRS | Yes | Yes | ||
| Edge | Yes | Yes | ||
| Wi-Fi | Wi-Fi 802.11 b/g/n, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | ||
| GPS | No | Yes, with A-GPS, BDS | ||
| NFC | ||||
| USB | Proprietary | microUSB 2.0, USB On-The-Go | ||
| Bluetooth | Yes | 5.0, A2DP, LE | ||
| Music and Audio | Radio | FM radio | FM radio | |
| Headphone jack | Yes | Yes | ||
| Others | 480 nits typ. brightness | |||
| Other features | Dop | Sensors Accelerometer | Sensors Fingerprint (rear-mounted), accelerometer, proximity, compass | |
