Phone Comparison - Lenovo A390 vs Samsung Galaxy Trend Duos S7392 vs Karbonn Smart A55
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| Manufacturer | Lenovo | Samsung | Karbonn |
| Announced | April 2013 | September 2013 | April 2014 |
| Status | Available - April 2013 | Available - September 2013 | Available - April 2014 |
| Colors | Black, White | White, Gray | White, Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
125.6 x 64 x 10.1 mm (4.94 x 2.52 x 0.4 in) |
121.5 x 63.1 x 10.85 mm (4.78 x 2.48 x 0.43 in) |
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| Weight | 131 g (4.62 oz) | 126 g (4.44 oz) | - |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 2100 | HSDPA 900 / 2100 - SIM 1 | No |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.0.4 (Ice Cream Sandwich) | Android OS, v4.1.2 (Jelly Bean) | Android OS, v4.2.2 (Jelly Bean) |
| Processor | Dual-core 1 GHz, MTK 6577 | 1 GHz Cortex-A9 | Dual-core 1.2 GHz, MTK 6572 |
| GPU | PowerVR SGX531 | - | Mali-400MP |
| RAM | 512 MB | 512 MB | 512 MB |
| Internal Memory | 4 GB | 4 GB (User Memory: 2.05 GB) | 4 GB ROM |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 32 GB |
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| Type | Capacitive touchscreen | TFT capacitive touchscreen | IPS LCD Capacitive Touchscreen, Wide Viewing Angle |
| Colors | - | 16M colors | 16M colors |
| Size | 4.0 inches | 4.0 inches | 3.5 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 480 x 800 pixels (233 ppi) | 320 x 480 pixels (165 ppi) |
| Screen-to-Body Ratio | 56.77% | 59.52% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM Radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 х 1944 pixels | 3.15 MP, 2048x1536 pixels | 3 MP, 2048 x 1536 pixels |
| Flash | No | No | LED flash |
| Features | Geo-tagging | CMOS Sensor, Single Shot, Panorama, Smile Shot, Share Shot, Photo Effects, White Balance, Timer, SF, 360 Deg Rotation | Geo-tagging |
| Video | Yes | Yes | Yes |
| Front Camera | No [Similar] | No [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, HSUPA | HSDPA, 7.2 Mbps; HSUPA, 5.76 Mbps | No |
| Bluetooth | Yes | Yes, v3.0 | Yes, v2.0 A2DP, EDR |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML5 | HTML | HTML |
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| Internal | 4 GB, 512 MB RAM | 4 GB (User Memory: 2.05 GB), 512 MB RAM | 4 GB ROM, 512 MB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 32 GB |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| NFC | |
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| Type | Li-Ion Battery | Li-Ion Battery | Li-Ion Battery |
| Capacity | 1500 mAh | 1500 mAh | 1100 mAh |
| Stand by | Up to 220 h (2G) Up to 180 h (3G) |
Up to 350 h (3G) | - |
| Talk Time | Up to 14 h (2G) Up to 9 h (3G) |
Up to 8 h (3G) | - |
