Phone Comparison - Apple iPhone 4S vs Samsung Galaxy Mega 2 vs HTC Desire 820
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| Manufacturer | Apple | Samsung | HTC |
| Announced | October 2011 | August 2014 | September 2014 |
| Status | Available - October 2011 | Available - August 2014 | Coming Soon - September 2014 |
| Colors | Black, White | White, Black | Marble White, Tuxedo Grey, Santorini White, Milky-way Grey, Tang |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
115.2 x 58.6 x 9.3 mm (4.54 x 2.31 x 0.37 in) |
163.6 x 84.9 x 8.6 mm (6.44 x 3.34 x 0.34 in) |
157.7 x 78.7 x 7.7 mm (6.21 x 3.1 x 0.3 in) |
| Weight | 140 g (4.94 oz) | 194 g (6.84 oz) | 155 g (5.47 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 CDMA2000 1xEV-DO |
GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 - EMEA version HSDPA 900 / 2100 - Asia version |
| 4G Network | - | LTE 800 / 850 / 900 / 1800 / 1900 / 2100 / 2600 | LTE 900 / 1800 / 2100 / 2600 - EMEA version |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail |
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| OS | iOS 5 | Android OS, v4.4.3 (KitKat) | Android OS, v4.4.2 (KitKat) |
| Processor | 1 GHz dual-core ARM Cortex-A9 processor, Apple A5 chipset | Quad-core 1.5 GHz, Qualcomm Snapdragon 410 | Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 |
| GPU | PowerVR SGX543MP2 | Adreno 306 | Adreno 405 |
| RAM | 512 MB | 1.5 GB | 2 GB |
| Internal Memory | 16/32/64 GB storage | 8 GB | 16 GB |
| External Memory | No | microSD, up to 64 GB | microSD, up to 128 GB |
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| Type | LED-backlit IPS TFT | TFT capacitive touchscreen | LCD Capacitive Touchscreen |
| Colors | capacitive touchscreen | 16M colors | 16M colors |
| Size | 3.5 inches | 6.0 inches | 5.5 inches |
| Resolution | 640 x 960 pixels (330 ppi) | 720 x 1280 pixels (245 ppi) | 720 x 1280 pixels (267 ppi) |
| Screen-to-Body Ratio | 53.92% | 71.32% | 67.20% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | FM Radio | No |
| Games | Downloadable, incl. motion-bas | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264x2448 pixels | 8 MP, 3264x2448 pixels | 13 MP, 4160 x 3120 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Touch Focus, Geo-tagging, Face Detection, HDR | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection, Simultaneous HD Video And Image Recording, HDR |
| Video | Yes, 1080p@30fps, LED video light, video stabilization, geo-tagging | Yes, 1080p@30fps | 1080p@30fps, 720p@60fps |
| Front Camera | Yes, VGA [Similar] | Yes, 2 MP, 720p [Similar] | 8 MP, 1080p [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 14.4 Mbps; HSUPA, 5.8 Mbps | HSDPA 42 Mbps, HSUPA; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL |
| Bluetooth | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP, LE | 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 Direct, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot |
| USB | Yes, v2.0 | Yes, microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS, GLONASS |
| Browser | HTML (Safari) | HTML5 | HTML5 |
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| Call Records | 100 received, dialed and missed calls | Practically unlimited | Practically unlimited |
| Internal | 16/32/64 GB storage, 512 MB RAM | 8 GB, 1.5 GB RAM | 16 GB, 2 GB RAM |
| Expandable Storage | No | microSD, up to 64 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-Po | Li-Ion Battery | Non-removable Li-Po Battery |
| Capacity | 1432 mAh | 2800 mAh | 2600 mAh |
| Stand by | Up to 200 h (2G) Up to 200 h (3G) |
- | Up to 424 h (3G) |
| Talk Time | Up to 14 h (2G) Up to 8 h (3G) |
- | Up to 22 h 24 min (3G) |
