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Brief information about compared phones: Celkon A66 , Oppo R9 PlusCelkon A66 2014 year of release. cpu Dual-core 1.2 GHz. screen 4.5". with resolution 480x854. Smartphone has 0 megapixel front camera and 3 megapixel main camera . Oppo R9 Plus 2016 year of release. cpu Octa-core (4x1.8 GHz Cortex-A72 & 4x1.2 GHz Cortex-A53). screen 6". with resolution 1080x1920. Smartphone has 16 megapixel front camera and 16 megapixel main camera . |
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| Display | Technology | TFT | ||
| Touchscreen | capacitive touchscreen | capacitive touchscreen | ||
| Display colors | 16M | |||
| Screen size | 4.5" inch | 6" inch | ||
| Screen area | 55.8 cm2 | 99.2 cm2 | ||
| Screen format | 16:9 (height:width) | 16:9 (height:width) | ||
| Screen to body ratio | 61.1% | 75.3% | ||
| Screen resolution | 480 x 854 px | 1080 x 1920 px | ||
| PPI /points per inch/ | 218 PPI | 367 PPI | ||
| Screen protection | Corning Gorilla Glass 4 | |||
| Camera and Video | Rear camera, main | 3.15 MP, Single | 16 MP, Single | |
| Camera specs | 3.15 MP | 16 MP, f/2.0, 1/2.8'', PDAF | ||
| Functions | LED flash | LED flash, panorama, HDR | ||
| Video | Yes | 1080p@30fps | ||
| Front camera, selfie | 0.3 MP, Single | 16 MP, Single | ||
| Specifications | VGA | 16 MP, f/2.0 | ||
| Performance | Operating system OS | Android 4.1.2 (Jelly Bean) | Android 5.1 (Lollipop), upgradable to 6 (Marshmallow); ColorOS 3 | |
| Chipset | Qualcomm MSM8976 Snapdragon 652 (28 nm) | |||
| Processor CPU | Dual-core 1.2 GHz | Octa-core (4x1.8 GHz Cortex-A72 & 4x1.2 GHz Cortex-A53) | ||
| Graphics processor GPU | Adreno 510 | |||
| External memory | microSD, up to 32 GB | microSD, up to 256 GB (uses SIM 2 slot) | ||
| Internal memory | 4 GB, 512 MB RAM | 64/128 GB, 512GB 4GB | ||
| Antutu 7 score | 73252 | |||
| GeekBench 4 Single Core | 313 | |||
| GeekBench 4 Multi-Core | 1038 | |||
| General specs | Release date | 2014 | 2016, March | |
| Dimensions (HxWxD) | 136 Х 67.2 Х 11 mm | 163.1 Х 80.8 Х 7.4 mm | ||
| Weight | 98 g | 185 g | ||
| Colors | White, Black | Gold | ||
| Battery | 2000 mAh, Li-Ion | 4120 mAh, Non-removable Li-Po | ||
| Approximate price | 550 EUR | |||
| Battery life | Stand by time- Up to 160 h Talking time- Up to 5 h | |||
| Communication and Connectivity | SIM card | Dual SIM | Hybrid 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 -3G - HSDPA 850 / 900 / 1900 / 2100 CDMA2000 1xEV-DO & TD-SCDMA -4G - LTE band 1(2100), 3(1800), 5(850), 38(2600), 39(1900), 40(2300), 41(2500) | ||
| Speed | HSPA, LTE | |||
| 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, WiFi Direct, hotspot | ||
| GPS | Yes | Yes, with A-GPS | ||
| NFC | ||||
| USB | microUSB | microUSB 2.0, USB Host | ||
| Bluetooth | 2.0 | 4.1, A2DP, LE | ||
| Harmful irradiation | SAR EU - 0.38 W/kg (head) 0.47 W/kg (body) | |||
| Music and Audio | Radio | FM radio | No | |
| Headphone jack | Yes | Yes | ||
| Others | Active noise cancellation with dedicated mic | |||
| Other features | Dop | Sensors Accelerometer, proximity | Sensors Fingerprint (front-mounted), accelerometer, gyro, proximity, compass - Fast battery charging: 75% in 30 min (VOOC Flash Charge) | |
