Phone Comparison - Apple iPhone 4 vs Apple iPad mini 2 Retina Display vs Xiaomi Mi Pad 7.9
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| Manufacturer | Apple | Apple | Xiaomi |
| Announced | June 2010 | October 2013 | March 2014 |
| Status | Available - June 2010 | Available - November 2013 | Available - June 2014 |
| Colors | Black, White | Space Gray, Silver | Blue, Green, Yellow, Pink, White, Gray |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
115.2 x 58.6 x 9.3 mm (4.54 x 2.31 x 0.37 in) |
200 x 134.7 x 7.5 mm (7.87 x 5.3 x 0.3 in) |
202 x 135.4 x 8.5 mm (7.95 x 5.33 x 0.33 in) |
| Weight | 137 g (4.83 oz) | 331 g / 341 g (11.68 oz / 12.03 oz) | 360 g (12.7 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 CDMA2000 1xEV-DO |
No |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | No |
| 4G Network | - | LTE- all models | - |
| Messaging | SMS, MMS, Push Mail, EMail, IM | , Push Mail, EMail, IM | , EMail, IM |
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| OS | iOS 4, upgradable to iOS 5 | iOS 7.0.2 | Android OS, v4.4 (KitKat) |
| Processor | 1 GHz Cortex-A8, Apple A4 | Dual-core 1.3 GHz Cyclone (ARM v8-based), Apple A7 | Quad-core 2.2 GHz Cortex-A15, Nvidia Tegra K1 |
| GPU | PowerVR SGX535 | PowerVR G6430 (quad-core graphics) | ULP GeForce Kepler (192 cores) |
| RAM | 512 MB | N/A | 2 GB |
| Internal Memory | 8/16/32 GB storage | 16/32/64/128 GB storage | 16/64 GB |
| External Memory | No | No | microSD, up to 128 GB |
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| Type | LED-backlit IPS TFT, capacitive touchscreen | LED-backlit IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 3.5 inches | 7.9 inches | 7.9 inches |
| Resolution | 640 x 960 pixels (330 ppi) | 1536 x 2048 pixels (324 ppi) | 1536 x 2048 pixels (324 ppi) |
| Screen-to-Body Ratio | 53.92% | 71.76% | 70.69% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | No | No |
| Games | Yes + downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 x 1944 pixels | 5 MP, 2592x1944 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | LED flash | No | No |
| Features | Auto focus, Touch Focus, Geo-tagging, HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR | - |
| Video | Yes, 720p@30fps, LED video light, geo-tagging | Yes, 1080p@30fps, video stabilization | 1080p |
| Front Camera | Yes, videocalling over Wi-Fi only [Similar] | Yes, 1.2 MP, 720p@30fps, face detection, [Similar] | 5 MP [Similar] |
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| GPRS | Class 10 (4+1/3+2 slots), 32 - 48 kbps | Yes | No |
| Edge | Class 10, 236.8 kbps | Yes | No |
| 3G | HSDPA, 7.2 Mbps; HSUPA, 5.76 Mbps | DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps, LTE, 100 Mbps; EV-DO Rev. A, up to 3.1 Mbps | No |
| Bluetooth | Yes, v2.1 with A2DP | Yes, v4.0 with A2DP, EDR | 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 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, v2.0 | Yes, v2.0 | microUSB v2.0, USB On-the-go |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS | No |
| Browser | HTML (Safari) | HTML (Safari) | HTML5 |
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| Internal | 8/16/32 GB storage, 512 MB RAM | 16/32/64/128 GB storage | 16/64 GB, 2 GB RAM |
| Expandable Storage | No | No | microSD, up to 128 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 | Non-removable Li-Po battery (23.8 Wh) | Li-Po Battery |
| Capacity | 1420 mAh | - | 6700 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) |
Up to 10 h (multimedia) | Up to 11 h (multimedia) |
