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Brief information about compared phones: Celkon A98 , Oppo A91Celkon A98 2013 year of release. cpu 1.0 GHz. screen 4". with resolution 480x800. Smartphone has 0 megapixel front camera and 3 megapixel main camera . Oppo A91 2019 year of release. cpu Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53). screen 6.4". with resolution 1080x2400. Smartphone has 16 megapixel front camera and 48 megapixel main camera . |
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| Display | Technology | AMOLED | ||
| Touchscreen | capacitive touchscreen | capacitive touchscreen | ||
| Display colors | 16M | |||
| Screen size | 4" inch | 6.4" inch | ||
| Screen area | 45.5 cm2 | 100.4 cm2 | ||
| Screen format | 5:3 (height:width) | 20:9 (height:width) | ||
| Screen to body ratio | % | 85.5% | ||
| Screen resolution | 480 x 800 px | 1080 x 2400 px | ||
| PPI /points per inch/ | 233 PPI | 408 PPI | ||
| Screen protection | Corning Gorilla Glass 5 | |||
| Camera and Video | Rear camera, main | 3.15 MP, Single | 48 MP, Quad | |
| Camera specs | 3.15 MP | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF -8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm -2 MP B/W, f/2.4, 1/5.0", 1.75µm -2 MP, 1.75µm, depth sensor | ||
| Functions | HDR | |||
| Video | Yes | 1080p@30fps | ||
| Front camera, selfie | 0.3 MP, Single | 16 MP, Single | ||
| Specifications | 16 MP, f/2.0, 26mm (wide), 1/3.1'', 1.0µm | |||
| Performance | Operating system OS | Android 4.0 (Ice Cream Sandwich) | Android 9.0 (Pie); ColorOS 6.1 | |
| Chipset | Mediatek MT6771V Helio P70 (12nm) | |||
| Processor CPU | 1.0 GHz | Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) | ||
| Graphics processor GPU | Mali-G72 MP3 | |||
| External memory | microSD, up to 32 GB (dedicated slot) | microSD, up to 256 GB (dedicated slot) | ||
| Internal memory | 128GB 8GB RAM | |||
| Antutu 7 score | 135756 | |||
| General specs | Release date | 2013 | 2019, December | |
| Dimensions (HxWxD) | Х Х mm | 160.2 Х 73.3 Х 7.9 mm | ||
| Weight | 0 g | 172 g | ||
| Colors | Black | Dark Blue, Red, Blue | ||
| Battery | 1800 mAh, Li-Ion | 4025 mAh, Non-removable Li-Po | ||
| Approximate price | 260 EUR | |||
| Battery life | Stand by time- Up to 180 h Talking time- Up to 6 h | |||
| Body build | Glass front (Gorilla Glass 5), 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: -2G - GSM 900 / 1800 - SIM 1 & SIM 2 | Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 1700(AWS) / 1900 / 2100 -4G - LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) | ||
| Speed | HSPA | HSPA 42.2/11.5 Mbps, LTE-A | ||
| GPRS | Yes | Yes | ||
| Edge | Class 12 | Yes | ||
| Wi-Fi | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 a/b/g/n/ac/ax, dual-band, Wi-Fi Direct, hotspot | ||
| GPS | No | Yes, with A-GPS, GLONASS, BDS | ||
| NFC | ||||
| USB | Proprietary | 2.0, Type-C 1.0 reversible connector, USB On-The-Go | ||
| Bluetooth | Yes | 4.2, A2DP, LE | ||
| Music and Audio | Radio | FM radio | FM radio | |
| Headphone jack | Yes | Yes | ||
| Others | 430 nits typ. brightness | |||
| Other features | Dop | Sensors Accelerometer | Sensors Fingerprint (under display, optical), accelerometer, gyro, proximity, compass - Fast charging 20W, 50% in 30 min -VOOC 3.0 | |
