Phone Comparison - HTC Desire 816 vs HTC Desire 820 vs HTC One A9
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| Manufacturer | HTC | HTC | HTC |
| Announced | February 2014 | September 2014 | October 2015 |
| Status | Available - March 2014 | Coming Soon - September 2014 | Available - November 2015 |
| Price | - | - | Rs. 24,495 ($360.22) [Similarly Priced] |
| Colors | Red, Grey, Green, Cyan, White, Black | Marble White, Tuxedo Grey, Santorini White, Milky-way Grey, Tang | Acid Gold, Opal Silver, Deep Garnet, Carbon Gray, Rose Gold, Cas |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
156.6 x 78.7 x 8 mm (6.17 x 3.1 x 0.31 in) |
157.7 x 78.7 x 7.7 mm (6.21 x 3.1 x 0.3 in) |
145.8 x 70.8 x 7.3 mm (5.74 x 2.79 x 0.29 in) |
| Weight | 165 g (5.82 oz) | 155 g (5.47 oz) | 143 g (5.04 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 - EMEA version HSDPA 900 / 2100 - Asia version |
HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE 800 / 900 / 1800 / 2600 - EMEA LTE 900 / 1800 / 2100 / 2600 - Asia |
LTE 900 / 1800 / 2100 / 2600 - EMEA version | LTE |
| Messaging | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail |
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| OS | Android OS, v4.4.2 (KitKat) | Android OS, v4.4.2 (KitKat) | Android OS, v6.0 (Marshmallow) |
| Processor | Quad-core 1.6 GHz Cortex-A7, Qualcomm MSM8928 Snapdragon 400 | Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 | Octa-core 1.5 GHz Cortex-A53, Qualcomm MSM8952 Snapdragon 617 |
| GPU | Adreno 305 | Adreno 405 | Adreno 405 |
| RAM | 1.5 GB | 2 GB | 3 GB |
| Internal Memory | 8 GB ROM | 16 GB | 32 GB |
| External Memory | microSD, up to 64 GB | microSD, up to 128 GB | microSD, up to 128 GB |
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| Type | Capacitive Touchscreen | LCD Capacitive Touchscreen | AMOLED capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.5 inches | 5.5 inches | 5.0 inches |
| Resolution | 720 x 1280 pixels (267 ppi) | 720 x 1280 pixels (267 ppi) | 1080 x 1920 pixels (441 ppi) |
| Screen-to-Body Ratio | 67.67% | 67.20% | 66.64% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | - | No | - |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4160 x 3120 pixels | 13 MP, 4160 x 3120 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | LED flash | 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, Simultaneous HD Video And Image Recording, HDR | Autofocus, Optical Image Stabilization, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR |
| Video | Yes, 720p | 1080p@30fps, 720p@60fps | Yes |
| Front Camera | Yes, 5 MP, 720p [Similar] | 8 MP, 1080p [Similar] | 4 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, HSUPA; LTE | HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | Yes, v4.0 with A2DP | v4.0, A2DP | v4.1, A2DP, apt-X |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, Wi-Fi Direct, 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, hotspot |
| USB | Yes, microUSB 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 | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB ROM, 1.5 GB RAM | 16 GB, 2 GB RAM | 32 GB, 3 GB RAM |
| Expandable Storage | microSD, up to 64 GB | 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 | Non-removable Li-Po Battery | Non-removable Li-Po Battery | Non-removable Li-Ion Battery |
| Capacity | 2600 mAh | 2600 mAh | 2150 mAh |
| Stand by | - | Up to 424 h (3G) | - |
| Talk Time | - | Up to 22 h 24 min (3G) | - |
