Phone Comparison - Lenovo K900 vs Lenovo Vibe X vs Lenovo A680
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| Manufacturer | Lenovo | Lenovo | Lenovo |
| Announced | January 2013 | September 2013 | March 2014 |
| Status | Available - April 2013 | Available - December 2013 | Available - March 2014 |
| Colors | Black | Black/Silver | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
157 x 78 x 6.9 mm (6.18 x 3.07 x 0.27 in) |
6.9 mm thickness (0.27 in thickness) |
145 x 73.5 x 10.8 mm (5.71 x 2.89 x 0.43 in) |
| Weight | 162 g (5.71 oz) | 120 g (4.23 oz) | 165 g (5.82 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 2100 | HSDPA | HSDPA 2100 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.2 (Jelly Bean) | Android OS, v4.2 (Jelly Bean) | Android OS, v4.2.2 (Jelly Bean) |
| Processor | Dual-core 2.0 GHz, Intel Atom Z2580 | Quad-core 1.5 GHz, MTK MT6589T | Quad-core 1.3 GHz, Mediatek MT6582M |
| GPU | PowerVR SGX544 | PowerVR SGX544 | Mali-400MP2 |
| RAM | 2 GB | 2 GB | 1 GB |
| Internal Memory | 16 GB | 16 GB | 4 GB ROM |
| External Memory | microSD, up to 32 GB | No | microSD, up to 32 GB |
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| Type | IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen | Capacitive Touchscreen, OnCell technology |
| Colors | 16M colors | 16M colors | 16.7M colors |
| Size | 5.5 inches | 5.0 inches | 5 inches |
| Resolution | 1080 x 1920 pixels (401 ppi) | 1080 x 1920 pixels (441 ppi) | 480 x 854 pixels (196 ppi) |
| Screen-to-Body Ratio | 67.94% | - | 64.60% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio | - | FM Radio with Recording |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, autofocus | 13 MP, 4128 x 3096 pixels | 5 MP, 2592 x 1944 pixels |
| Flash | dual-LED flash | LED flash | LED flash |
| Features | Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection | Fixed focus, Geo-tagging, Touch Focus, Face Detection, HDR |
| Video | Yes, 1080p@30fps | Yes, 1080p@30fps | Yes, 1080p@30fps |
| Front Camera | Yes, 2 MP [Similar] | Yes, 5 MP [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA+ | HSPA+ | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, with A2DP | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, dual band, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual band, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0, USB On-the-go | Yes, microUSB v2.0, USB On-the-go |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 16 GB, 2 GB RAM | 16 GB, 2 GB RAM | 4 GB ROM, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | No | microSD, up to 32 GB |
| USB OTG | - | Supported | Supported |
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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-Po Battery |
| Capacity | 2500 mAh | 2000 mAh | 2000 mAh |
| Stand by | - | - | Up to 312 h (2G) Up to 348 h (3G) |
| Talk Time | - | - | Up to 13 h (2G) Up to 24 h (3G) |
