Phone Comparison - Apple iPad 2 Wi-Fi + 3G vs Google Nexus 9 vs Xiaomi Mi Pad 7.9
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| Manufacturer | Apple | HTC | Xiaomi |
| Announced | March 2011 | October 2014 | March 2014 |
| Status | Available - March 2011 | Available - October 2014 | Available - June 2014 |
| Colors | Black, White | Indigo Black, Lunar White, Sand | Blue, Green, Yellow, Pink, White, Gray |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
241.2 x 185.7 x 8.8 mm (9.5 x 7.31 x 0.35 in) |
228.25 x 153.68 x 7.95 mm (8.99 x 6.05 x 0.31 in) |
202 x 135.4 x 8.5 mm (7.95 x 5.33 x 0.33 in) |
| Weight | 607 g (21.41 oz) | 425 g / 436 g (14.99 oz / 15.38 oz) | 360 g (12.7 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | No |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | No |
| 4G Network | - | LTE 800 / 1800 / 2600 | - |
| Messaging | , Push Mail, EMail, IM | SMS, MMS, EMail, IM | , EMail, IM |
| Build Features | - | Dual front-facing speakers with HTC BoomSound | - |
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| OS | iOS 4, upgradable to iOS 5 | Android OS, v5.0 (Lollipop) | Android OS, v4.4 (KitKat) |
| Processor | Dual-core 1 GHz Cortex-A9, Apple A5 | Quad-core 2.2 GHz Cortex-A15, Nvidia Tegra K1 | Quad-core 2.2 GHz Cortex-A15, Nvidia Tegra K1 |
| GPU | PowerVR SGX543MP2 | ULP GeForce Kepler (192 cores) | ULP GeForce Kepler (192 cores) |
| RAM | 512 MB | 2 GB | 2 GB |
| Internal Memory | 16/32/64 GB storage | 16/32 GB | 16/64 GB |
| External Memory | No | No | microSD, up to 128 GB |
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| Type | LED-backlit IPS TFT, capacitive touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 9.7 inches | 8.9 inches | 7.9 inches |
| Resolution | 768 x 1024 pixels (132 ppi) | 2048 x 1536 pixels (288 ppi) | 1536 x 2048 pixels (324 ppi) |
| Screen-to-Body Ratio | 65.01% | 69.76% | 70.69% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | No | No |
| Games | Yes | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 0.7 MP, 960 x 720 pixels | 8 MP, 3264 x 2448 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | No | LED flash | No |
| Features | No | Auto focus, Geo-tagging, Touch Focus, Face Detection, OIS | - |
| Video | Yes, 720p@30fps | Yes, 1080p@30fps | 1080p |
| Front Camera | Yes, VGA [Similar] | Yes, 1.6 MP [Similar] | 5 MP [Similar] |
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| GPRS | Yes | Yes | No |
| Edge | Yes | Yes | No |
| 3G | HSDPA; HSUPA | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | No |
| Bluetooth | Yes, v2.1 with A2DP, EDR | Yes, v4.0 with A2DP | v4.0 |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, v2.0 | Yes, microUSB 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) | HTML5 | HTML5 |
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| Internal | 16/32/64 GB storage, 512 MB RAM | 16/32 GB, 2 GB RAM | 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 | Li-Po Battery |
| Capacity | 6930 mAh (25 Wh) | 6700 mAh | 6700 mAh |
| Stand by | Up to 720 h | Up to 720 h | - |
| Talk Time | Up to 10 h | Up to 9 h 30 min | Up to 11 h (multimedia) |
