Phone Comparison - Apple iPhone 4 vs Lenovo S820 vs Xiaomi Redmi 2
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| Manufacturer | Apple | Lenovo | Xiaomi |
| Announced | June 2010 | May 2013 | January 2015 |
| Status | Available - June 2010 | Available - May 2013 | Available - January 2015 |
| Price | - | - | Rs. 5,999 ($88.22) [Similarly Priced] |
| Colors | Black, White | Flamingo red | Black, White, Yellow, Pink, Green |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
115.2 x 58.6 x 9.3 mm (4.54 x 2.31 x 0.37 in) |
139.5 x 69.7 x 9 mm (5.49 x 2.74 x 0.35 in) |
134 x 67.2 x 9.4 mm (5.28 x 2.65 x 0.37 in) |
| Weight | 137 g (4.83 oz) | 143 g (5.04 oz) | 133 g (4.69 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 2100 | HSDPA 850 / 1900 / 2100 TD-SCDMA 1900 / 2100 |
| 4G Network | - | - | LTE 1800 / 2600 TD-LTE 1900 / 2300 / 2500 / 2600 (Bands 3, 7, 38, 39, 40, 41) |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM |
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| OS | iOS 4, upgradable to iOS 5 | Android OS, v4.2 (Jelly Bean) | Android OS, v4.4 (KitKat) |
| Processor | 1 GHz Cortex-A8, Apple A4 | Quad-core 1.2 GHz, MTK 6589W | Quad-core 1.2 GHz Cortex-A53, Qualcomm MSM8916 Snapdragon 410 |
| GPU | PowerVR SGX535 | PowerVR SGX544 | Adreno 306 |
| RAM | 512 MB | 1 GB | 1 GB |
| Internal Memory | 8/16/32 GB storage | 4 GB | 8 GB |
| External Memory | No | microSD, up to 32 GB | microSD, up to 32 GB |
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| Type | LED-backlit IPS TFT, capacitive touchscreen | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 3.5 inches | 4.7 inches | 4.7 inches |
| Resolution | 640 x 960 pixels (330 ppi) | 720 x 1280 pixels (312 ppi) | 720 x 1280 pixels (312 ppi) |
| Screen-to-Body Ratio | 53.92% | 62.82% | 67.83% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | FM radio; built-in antenna | FM Radio |
| Games | Yes + downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 x 1944 pixels | 12 MP, 4000 x 3000 pixels | 8 MP, 3264 x 2448 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, HDR, Sony Sensor, Panorama, Real-time HDR |
| Video | Yes, 720p@30fps, LED video light, geo-tagging | Yes | Yes, 1080p |
| Front Camera | Yes, videocalling over Wi-Fi only [Similar] | Yes, 2 MP [Similar] | 2 MP, 720p [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 | HSDPA, HSUPA | HSPA, LTE Cat4 150/50 Mbps |
| Bluetooth | Yes, v2.1 with A2DP | Yes, v3.0 with A2DP | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual band | Wi-Fi 802.11 b/g/n, hotspot |
| USB | Yes, v2.0 | Yes, microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML (Safari) | HTML | HTML5 |
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| Internal | 8/16/32 GB storage, 512 MB RAM | 4 GB, 1 GB RAM | 8 GB, 1 GB RAM / 16 GB, 2 GB RAM |
| Expandable Storage | No | 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 | Standard battery, Li-Po | Li-Po Battery | Li-Po Battery |
| Capacity | 1420 mAh | 2000 mAh | 2200 mAh |
| Stand by | Up to 300 h (2G) Up to 300 h (3G) |
Up to 140 h (2G) Up to 140 h (3G) |
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| Talk Time | Up to 14 h (2G) Up to 7 h (3G) |
Up to 22 h (2G) Up to 10 h (3G) |
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