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Brief information about compared phones: Acer M900 , Celkon A66Acer M900 2009 year of release. cpu 533 MHz Samsung S3C 6410. screen 3.8". with resolution 480x800. Smartphone has 0 megapixel front camera and 5 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 | TFT | TFT | |
| Touchscreen | resistive touchscreen | capacitive touchscreen | ||
| Display colors | 65K | |||
| Screen size | 3.8" inch | 4.5" inch | ||
| Screen area | 41.1 cm2 | 55.8 cm2 | ||
| Screen format | 5:3 (height:width) | 16:9 (height:width) | ||
| Screen to body ratio | 55.7% | 61.1% | ||
| Screen resolution | 480 x 800 px | 480 x 854 px | ||
| PPI /points per inch/ | 246 PPI | 218 PPI | ||
| Camera and Video | Rear camera, main | 5 MP, Single | 3.15 MP, Single | |
| Camera specs | 5 MP, AF | 3.15 MP | ||
| Functions | Dual-LED flash | LED flash | ||
| Video | Yes | Yes | ||
| Front camera, selfie | 0.3 MP, Single | 0.3 MP, Single | ||
| Specifications | VGA videocall camera | VGA | ||
| Performance | Operating system OS | Microsoft Windows Mobile 6.1 Professional | Android 4.1.2 (Jelly Bean) | |
| Processor CPU | 533 MHz Samsung S3C 6410 | Dual-core 1.2 GHz | ||
| External memory | microSD (dedicated slot) | microSD, up to 32 GB | ||
| Internal memory | Super AMOLED | 4 GB, 512 MB RAM | ||
| General specs | Release date | 2009, February | 2014 | |
| Dimensions (HxWxD) | 119 Х 62 Х 17.1 mm | 136 Х 67.2 Х 11 mm | ||
| Weight | 188 g | 98 g | ||
| Colors | Black | White, Black | ||
| Battery | 1530 mAh, Removable Li-Ion | 2000 mAh, Li-Ion | ||
| Approximate price | 250 EUR | |||
| Battery life | Stand by time- Up to 470 h Talking time- Up to 4 h | Stand by time- Up to 160 h Talking time- Up to 5 h | ||
| Communication and Connectivity | SIM card | Single SIM (Mini-SIM)Dual SIM (Mini-SIM/Micro-SIM | Dual SIM | |
| Network | Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2-3G - HSDPA 900 / 2100-4G - LTE | Show all network frequencies: | ||
| Speed | HSPA 7.2/2 Mbps | |||
| GPRS | Class 10 | Yes | ||
| Edge | Class 10 | Yes | ||
| Wi-Fi | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 b/g/n, hotspot | ||
| GPS | Yes, SiRF Star III chipset | Yes | ||
| NFC | Super AMOLED | |||
| USB | miniUSB | microUSB | ||
| Bluetooth | microUSB 2.0, A2DP | 2.0 | ||
| Harmful irradiation | SAR - 0.43 W/kg (head) 0.92 W/kg (body) | SAR EU - 0.38 W/kg (head) 0.47 W/kg (body) | ||
| Music and Audio | Radio | FM radio | FM radio | |
| Headphone jack | panorama | Yes | ||
| Others | Handwriting recognition | |||
| Other features | Dop | Sensors Fingerprint (front-mounted) Pocket Office -Voice memo -MP3 player -Predictive text input | Sensors Accelerometer, proximity | |
