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Brief information about compared phones: Apple iPhone 8 , Celkon A66Apple iPhone 8 2017 year of release. cpu Hexa-core (2x Monsoon + 4x Mistral). screen 4.7". with resolution 750x1334. Smartphone has 7 megapixel front camera and 12 megapixel main camera . Celkon 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 . |
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| Display | Technology | LED-backlit IPS LCD | TFT | |
| Touchscreen | capacitive touchscreen | capacitive touchscreen | ||
| Display colors | 16M | |||
| Screen size | 4.7" inch | 4.5" inch | ||
| Screen area | 60.9 cm2 | 55.8 cm2 | ||
| Screen format | 16:9 (height:width) | 16:9 (height:width) | ||
| Screen to body ratio | 65.4% | 61.1% | ||
| Screen resolution | 750 x 1334 px | 480 x 854 px | ||
| PPI /points per inch/ | 326 PPI | 218 PPI | ||
| Screen protection | Ion-strengthened glass, oleophobic coating | |||
| Camera and Video | Rear camera, main | 12 MP, Single | 3.15 MP, Single | |
| Camera specs | 12 MP, f/1.8, 28mm (wide), OIS, PDAF | 3.15 MP | ||
| Functions | Face detection, HDR, panorama | LED flash | ||
| Video | 1080p@30fps | Yes | ||
| Front camera, selfie | 7 MP, Single | 0.3 MP, Single | ||
| Specifications | 7 MP, f/2.2 | VGA | ||
| DxOMark Main Score | 92 | |||
| DxOMark Photo | 93 | |||
| DxOMark Video | 90 | |||
| Performance | Operating system OS | iOS 11, upgradable to iOS 12.1.3 | Android 4.1.2 (Jelly Bean) | |
| Chipset | Apple A11 Bionic (10 nm) | |||
| Processor CPU | Hexa-core (2x Monsoon + 4x Mistral) | Dual-core 1.2 GHz | ||
| Graphics processor GPU | Apple GPU (three-core graphics) | |||
| External memory | No | microSD, up to 32 GB | ||
| Internal memory | 64/256 GB, 2 GB RAM | 4 GB, 512 MB RAM | ||
| Antutu 7 score | 232308 | |||
| Antutu 8 score | 274781 | |||
| General specs | Release date | 2017, September | 2014 | |
| Dimensions (HxWxD) | 138.4 Х 67.3 Х 7.3 mm | 136 Х 67.2 Х 11 mm | ||
| Weight | 148 g | 98 g | ||
| Colors | Silver, Space Gray, Gold, Red | White, Black | ||
| Battery | 1821 mAh, Non-removable Li-Ion | 2000 mAh, Li-Ion | ||
| Approximate price | 700 EUR | |||
| Battery life | Talking time- Up to 14 h (3G) Music play - Up to 40 h | Stand by time- Up to 160 h Talking time- Up to 5 h | ||
| Body build | Front/back glass, aluminum frame | |||
| Communication and Connectivity | SIM card | Nano-SIM | Dual SIM | |
| Network | Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 -3G - HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G - LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 29(700), 30(2300), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500), 66(1700/2100) | Show all network frequencies: | ||
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (3CA) Cat12 600/150 Mbps, EV-DO Rev.A 3.1 Mbps | |||
| GPRS | Yes | Yes | ||
| Edge | Yes | Yes | ||
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot | Wi-Fi 802.11 b/g/n, hotspot | ||
| GPS | Yes, with A-GPS, GLONASS, GALILEO, QZSS | Yes | ||
| NFC | Yes | |||
| USB | 2.0, proprietary reversible connector | microUSB | ||
| Bluetooth | 5.0, A2DP, LE | 2.0 | ||
| Harmful irradiation | SAR - 1.32 W/kg (head) 1.36 W/kg (body) SAR EU - 1.19 W/kg (head) 1.17 W/kg (body) | SAR EU - 0.38 W/kg (head) 0.47 W/kg (body) | ||
| Music and Audio | Radio | No | FM radio | |
| Headphone jack | No | Yes | ||
| Others | Wide color gamut -3D Touch display & home button -True-tone | |||
| Other features | Dop | Sensors Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer - Fast battery charging: 50% in 30 min -Qi wireless charging -Siri natural language commands and dictation - IP67 dust/water resistant (up to 1m for 30 mins) -Apple Pay (Visa, MasterCard, AMEX certified) - Versions: A1863 (USA, Hong Kong, Australia, New Zealand, China) A1905 (EMEA, UAE, LATAM, Canada, USA AT&T/T-Mobile, Singapore); A1906 (Japan) | Sensors Accelerometer, proximity | |
