Phone Comparison - Apple iPhone 3G vs HTC Desire 820 vs HTC Desire 620 Dual SIM
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| Manufacturer | Apple | HTC | HTC |
| Announced | June 2008 | September 2014 | December 2014 |
| Status | Discontinued | Coming Soon - September 2014 | Available - December 2014 |
| Colors | Black(8/16 GB), White (16 GB) | Marble White, Tuxedo Grey, Santorini White, Milky-way Grey, Tang | Blue, Black, Gray, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
115.5 x 62.1 x 12.3 mm (4.55 x 2.44 x 0.48 in) |
157.7 x 78.7 x 7.7 mm (6.21 x 3.1 x 0.3 in) |
150.1 x 72.7 x 9.6 mm (5.91 x 2.86 x 0.38 in) |
| Weight | 133 g (4.69 oz) | 155 g (5.47 oz) | 160 g (5.64 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 - EMEA version HSDPA 900 / 2100 - Asia version |
HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | - | LTE 900 / 1800 / 2100 / 2600 - EMEA version | LTE 900 / 1800 / 2100 / 2600 TD-LTE 1900 / 2300 / 2600 |
| Messaging | SMS, MMS | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail |
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| OS | iPhone OS, upgradable to iOS 4 | Android OS, v4.4.2 (KitKat) | Android OS, v4.4.4 (KitKat) |
| Processor | 412 MHz ARM 11 | Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 | Quad-core 1.2 GHz Cortex-A53, Qualcomm MSM8916 Snapdragon 410 |
| GPU | PowerVR MBX | Adreno 405 | Adreno 306 |
| RAM | 128 MB | 2 GB | 1 GB |
| Internal Memory | 8 GB/ 16 GB storage | 16 GB | 8 GB |
| External Memory | No | microSD, up to 128 GB | microSD, up to 128 GB |
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| Type | TFT capacitive touchscreen | LCD Capacitive Touchscreen | Capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 3.5 inches | 5.5 inches | 5.0 inches |
| Resolution | 320 x 480 pixels (165 ppi) | 720 x 1280 pixels (267 ppi) | 720 x 1280 pixels (294 ppi) |
| Screen-to-Body Ratio | 50.75% | 67.20% | 63.04% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | No | FM radio |
| Games | Yes | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 2 MP, 1600x1200 pixels | 13 MP, 4160 x 3120 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection, Simultaneous HD Video And Image Recording, HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama | |
| Video | No | 1080p@30fps, 720p@60fps | 1080p@30fps |
| Front Camera | No [Similar] | 8 MP, 1080p [Similar] | 5 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA | HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSPA, LTE |
| Bluetooth | Yes, v2.0 with A2DP, headset support only | v4.0, A2DP | v4.0, A2DP, apt-X |
| Wi-Fi | Wi-Fi 802.11b/g | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, hotspot |
| USB | Yes, v2.0 | microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS |
| Browser | HTML (Safari) | HTML5 | HTML5 |
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| Internal | 8 GB/ 16 GB storage, 128 MB RAM | 16 GB, 2 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | No | microSD, up to 128 GB | microSD, up to 128 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-Ion | Non-removable Li-Po Battery | Li-Po Battery |
| Capacity | 2600 mAh | 2100 mAh | |
| Stand by | Up to 300 h | Up to 424 h (3G) | - |
| Talk Time | Up to 10 h | Up to 22 h 24 min (3G) | - |
