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Brief information about compared phones: Celkon A40 , O2 XDA CometCelkon A40 2014 year of release. cpu Dual-core 1.3 GHz. screen 4". with resolution 480x800. Smartphone has 0 megapixel front camera and 5 megapixel main camera . O2 XDA Comet 2007 year of release. cpu Intel XScale PXA 270 620 MHz. screen 2.7". with resolution 240x320. Smartphone has 0 megapixel front camera and 2 megapixel main camera . |
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| Display | Technology | TFT | TFT | |
| Touchscreen | touchscreen | resistive touchscreen | ||
| Display colors | 65K | |||
| Screen size | 4" inch | 2.7" inch | ||
| Screen area | 45.5 cm2 | 22.6 cm2 | ||
| Screen format | 5:3 (height:width) | 4:3 (height:width) | ||
| Screen to body ratio | 56.4% | 36.7% | ||
| Screen resolution | 480 x 800 px | 240 x 320 px | ||
| PPI /points per inch/ | 233 PPI | 148 PPI | ||
| Camera and Video | Rear camera, main | 5 MP, Single | 2 MP, Single | |
| Camera specs | 5 MP | 2 MP | ||
| Functions | LED flash | |||
| Video | Yes | Yes | ||
| Front camera, selfie | 0.3 MP, Single | 0.3 MP, Single | ||
| Specifications | VGA | VGA videocall camera | ||
| Performance | Operating system OS | Android 4.2.2 (Jelly Bean) | Microsoft Windows Mobile 6.0 Professional | |
| Processor CPU | Dual-core 1.3 GHz | Intel XScale PXA 270 620 MHz | ||
| External memory | microSD, up to 32 GB (dedicated slot) | miniSD | ||
| Internal memory | 4 GB, 512 MB RAM | 64 MB RAM, 1 GB ROM | ||
| General specs | Release date | 2014, January | 2007, September | |
| Dimensions (HxWxD) | 126.2 Х 64 Х 10.8 mm | 106 Х 58 Х 19 mm | ||
| Weight | 126.5 g | 145 g | ||
| Colors | White, Yellow, Blue | Silver | ||
| Battery | 1500 mAh, Li-Ion | 0 mAh, | ||
| Battery life | Stand by time- Up to 200 h Talking time- Up to 6 h | |||
| Communication and Connectivity | SIM card | Dual SIM | Mini-SIM | |
| Network | Show all network frequencies: | Show all network frequencies: -2G - GSM 900 / 1800 / 1900 | ||
| Speed | HSPA | |||
| GPRS | Yes | Class 10 | ||
| Edge | Yes | Yes | ||
| Wi-Fi | Wi-Fi 802.11 b/g/n, hotspot | Wi-Fi 802.11b/g | ||
| GPS | Yes | No | ||
| NFC | ||||
| USB | microUSB 2.0 | miniUSB | ||
| Bluetooth | 2.0 | 1.2 | ||
| Music and Audio | Radio | FM radio | Stereo FM radio, RDS | |
| Headphone jack | Yes | No | ||
| Others | Handwriting recognition | |||
| Other features | Dop | Sensors Accelerometer, proximity | , Infrared port - Pocket Office -Voice memo -MP3/AAC player | |
