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Brief information about compared phones: Celkon A35k , Oppo A39Celkon A35k 2014 year of release. cpu 1.0 GHz. screen 3.5". with resolution 320x480. Smartphone has 0 megapixel front camera and 3 megapixel main camera . Oppo A39 2017 year of release. cpu Octa-core (4x1.5 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53). screen 5.2". with resolution 720x1280. Smartphone has 5 megapixel front camera and 13 megapixel main camera . |
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| Display | Technology | TFT | IPS LCD | |
| Touchscreen | capacitive touchscreen | capacitive touchscreen | ||
| Display colors | 16M | |||
| Screen size | 3.5" inch | 5.2" inch | ||
| Screen area | 36.5 cm2 | 74.5 cm2 | ||
| Screen format | 3:2 (height:width) | 16:9 (height:width) | ||
| Screen to body ratio | 48.7% | 68.6% | ||
| Screen resolution | 320 x 480 px | 720 x 1280 px | ||
| PPI /points per inch/ | 165 PPI | 282 PPI | ||
| Screen protection | Corning Gorilla Glass 4 | |||
| Camera and Video | Rear camera, main | 3.15 MP, Single | 13 MP, Single | |
| Camera specs | 3.15 MP | 13 MP, f/2.2, 1/3'', AF | ||
| Functions | LED flash, panorama, HDR | |||
| Video | Yes | 1080p@30fps | ||
| Front camera, selfie | 0.3 MP, Single | 5 MP, Single | ||
| Specifications | VGA | 5 MP, f/2.4, 1/4'', 1.4µm | ||
| Performance | Operating system OS | Android 4.4.2 (KitKat) | Android 5.1 (Lollipop); ColorOS 3 | |
| Chipset | Mediatek MT6750 (28 nm) | |||
| Processor CPU | 1.0 GHz | Octa-core (4x1.5 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53) | ||
| Graphics processor GPU | Mali-T860MP2 | |||
| External memory | microSD, up to 32 GB | microSD, up to 256 GB (dedicated slot) | ||
| Internal memory | 512 MB/ 2 GB, 256 MB RAM | 32 GB, 3 GB RAM | ||
| GeekBench 4 Single Core | 639 | |||
| GeekBench 4 Multi-Core | 2481 | |||
| GeekBench 4 RenderScript | 1870 | |||
| General specs | Release date | 2014 | 2017, March | |
| Dimensions (HxWxD) | 119 Х 63 Х 10.7 mm | 149.1 Х 72.9 Х 7.7 mm | ||
| Weight | 102 g | 147 g | ||
| Colors | White, Blue | Gold, Rose Gold | ||
| Battery | 1400 mAh, Removable Li-Ion | 2900 mAh, Non-removable Li-Ion | ||
| Approximate price | 40 EUR | 150 EUR | ||
| Body build | aluminum body, plastic ends | |||
| 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 -3G - HSDPA 850 / 900 / 2100 -4G - LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 38(2600), 40(2300), 41(2500) LTE band 1(2100), 20(800), 28(700), 39(1900), 41(2500) | ||
| Speed | HSPA | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | ||
| GPRS | Yes | Yes | ||
| Edge | Yes | Yes | ||
| Wi-Fi | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 a/b/g/n, dual-band, hotspot | ||
| GPS | No | Yes, with A-GPS | ||
| NFC | ||||
| USB | microUSB 2.0 | microUSB 2.0, USB On-The-Go | ||
| Bluetooth | 2.0 | 4.0, A2DP | ||
| Harmful irradiation | SAR EU - 0.56 W/kg (head) 0.51 W/kg (body) | |||
| Music and Audio | Radio | FM radio | FM radio | |
| Headphone jack | Yes | Yes | ||
| Other features | Dop | Sensors Accelerometer, proximity | Sensors Accelerometer, proximity, compass | |
