Phone Comparison - Lenovo A390 vs Asus Zenfone 4 vs Lenovo A680
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| Manufacturer | Lenovo | Asus | Lenovo |
| Announced | April 2013 | January 2014 | March 2014 |
| Status | Available - April 2013 | Available - June 2014 | Available - March 2014 |
| Colors | Black, White | Black, White, Red, Blue, Yellow | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
125.6 x 64 x 10.1 mm (4.94 x 2.52 x 0.4 in) |
124.4 x 61.4 x 6.3-11.2 (4.9 x 2.42 x 0.25-0.44) |
145 x 73.5 x 10.8 mm (5.71 x 2.89 x 0.43 in) |
| Weight | 131 g (4.62 oz) | 115 g (4.06 oz) | 165 g (5.82 oz) |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 2100 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.0.4 (Ice Cream Sandwich) | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v4.2.2 (Jelly Bean) |
| Processor | Dual-core 1 GHz, MTK 6577 | Dual-core 1.2 GHz, Intel Atom Z2520 | Quad-core 1.3 GHz, Mediatek MT6582M |
| GPU | PowerVR SGX531 | PowerVR SGX544MP2 | Mali-400MP2 |
| RAM | 512 MB | 1 GB | 1 GB |
| Internal Memory | 4 GB | 8 GB | 4 GB ROM |
| External Memory | microSD, up to 32 GB | microSD, up to 64 GB | microSD, up to 32 GB |
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| Type | Capacitive touchscreen | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | Capacitive Touchscreen, OnCell technology |
| Colors | - | 16M colors | 16.7M colors |
| Size | 4.0 inches | 4.0 inches | 5 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 480 x 800 pixels (233 ppi) | 480 x 854 pixels (196 ppi) |
| Screen-to-Body Ratio | 56.77% | 59.74% | 64.60% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM Radio | FM Radio with Recording |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 х 1944 pixels | 5 MP, 2592 x 1944 pixels | 5 MP, 2592 x 1944 pixels |
| Flash | No | No | LED flash |
| Features | Geo-tagging | Auto focus, Geo-tagging, Panorama | Fixed focus, Geo-tagging, Touch Focus, Face Detection, HDR |
| Video | Yes | Yes, 1080p@30fps | Yes, 1080p@30fps |
| Front Camera | No [Similar] | Yes, VGA [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, HSUPA | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes | Yes, v4.0 with A2DP, EDR | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, 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, USB On-the-go |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML5 | HTML | HTML5 |
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| Internal | 4 GB, 512 MB RAM | 8 GB, 1 GB RAM | 4 GB ROM, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 64 GB | microSD, up to 32 GB |
| USB OTG | - | - | 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-Po Battery | Li-Po Battery |
| Capacity | 1500 mAh | 1200/1600 mAh | 2000 mAh |
| Stand by | Up to 220 h (2G) Up to 180 h (3G) |
Up to 192 h | Up to 312 h (2G) Up to 348 h (3G) |
| Talk Time | Up to 14 h (2G) Up to 9 h (3G) |
Up to 10 h | Up to 13 h (2G) Up to 24 h (3G) |
