Phone Comparison - Apple iPhone 4 vs Lenovo Vibe X vs Lenovo S939
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| Manufacturer | Apple | Lenovo | Lenovo |
| Announced | June 2010 | September 2013 | February 2014 |
| Status | Available - June 2010 | Available - December 2013 | Available - February 2014 |
| Colors | Black, White | Black/Silver | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
115.2 x 58.6 x 9.3 mm (4.54 x 2.31 x 0.37 in) |
6.9 mm thickness (0.27 in thickness) |
170 x 86.5 x 8.65 mm (6.69 x 3.41 x 0.34 in) |
| Weight | 137 g (4.83 oz) | 120 g (4.23 oz) | 180 g (6.35 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA | HSDPA 2100 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | iOS 4, upgradable to iOS 5 | Android OS, v4.2 (Jelly Bean) | Android OS, v4.2.2 (Jelly Bean) |
| Processor | 1 GHz Cortex-A8, Apple A4 | Quad-core 1.5 GHz, MTK MT6589T | Octa-core 1.7 GHz, Mediatek MT6592 |
| GPU | PowerVR SGX535 | PowerVR SGX544 | Mali-450MP4 |
| RAM | 512 MB | 2 GB | 1 GB |
| Internal Memory | 8/16/32 GB storage | 16 GB | 8 GB ROM |
| External Memory | No | No | microSD, up to 32 GB |
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| Type | LED-backlit IPS TFT, capacitive touchscreen | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen, OGS |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 3.5 inches | 5.0 inches | 6.0 inches |
| Resolution | 640 x 960 pixels (330 ppi) | 1080 x 1920 pixels (441 ppi) | 720 x 1280 pixels (245 ppi) |
| Screen-to-Body Ratio | 53.92% | - | 67.36% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | - | FM Radio with Recording |
| Games | Yes + downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 x 1944 pixels | 13 MP, 4128 x 3096 pixels | 8 MP, 3264x2448 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Touch Focus, Geo-tagging, HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection, 360 degree Panorama, HDR, Image Stabilization |
| Video | Yes, 720p@30fps, LED video light, geo-tagging | Yes, 1080p@30fps | Yes, 1080p@30fps |
| Front Camera | Yes, videocalling over Wi-Fi only [Similar] | Yes, 5 MP [Similar] | Yes, 1.6 MP [Similar] |
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| GPRS | Class 10 (4+1/3+2 slots), 32 - 48 kbps | Yes | Yes |
| Edge | Class 10, 236.8 kbps | Yes | Yes |
| 3G | HSDPA, 7.2 Mbps; HSUPA, 5.76 Mbps | HSPA+ | HSDPA, 42.2 Mbps, HSUPA, 11.5 Mbps |
| Bluetooth | Yes, v2.1 with A2DP | Yes, v4.0 with A2DP | Yes, v4.0 |
| Wi-Fi | Wi-Fi 802.11 b/g/n, 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, v2.0 | Yes, microUSB v2.0, USB On-the-go | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML (Safari) | HTML5 | HTML5 |
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| Internal | 8/16/32 GB storage, 512 MB RAM | 16 GB, 2 GB RAM | 8 GB ROM, 1 GB RAM |
| Expandable Storage | No | No | 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 | Standard battery, Li-Po | Li-Ion Battery | Li-Ion Battery |
| Capacity | 1420 mAh | 2000 mAh | 3000 mAh |
| Stand by | Up to 300 h (2G) Up to 300 h (3G) |
- | - |
| Talk Time | Up to 14 h (2G) Up to 7 h (3G) |
- | - |
