Phone Comparison - HTC Desire 820 vs Xiaomi Mi 4i vs Acer Liquid Z630S
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| Manufacturer | HTC | Xiaomi | Acer |
| Announced | September 2014 | April 2015 | September 2015 |
| Status | Coming Soon - September 2014 | Available - April 2015 | Available - September 2015 |
| Price | - | Rs. 8,999 ($132.34) [Similarly Priced] | - |
| Colors | Marble White, Tuxedo Grey, Santorini White, Milky-way Grey, Tang | Black, White, Blue, Yellow, Pink | Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
157.7 x 78.7 x 7.7 mm (6.21 x 3.1 x 0.3 in) |
138.1 x 69.6 x 7.8 mm (5.44 x 2.74 x 0.31 in) |
156.3 x 77.5 x 8.9 mm (6.15 x 3.05 x 0.35 in) |
| Weight | 155 g (5.47 oz) | 130 g (4.59 oz) | 165 g (5.82 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (optional) |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 - EMEA version HSDPA 900 / 2100 - Asia version |
HSDPA 850 / 900 / 1900 / 2100 | HSDPA |
| 4G Network | LTE 900 / 1800 / 2100 / 2600 - EMEA version | LTE | LTE |
| Messaging | SMS, MMS, Push Mail, EMail | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.4.2 (KitKat) | Android OS, v5.0 (Lollipop) | Android OS, v5.1 (Lollipop) |
| Processor | Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 | Quad-core 1.7 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 | Octa-core 1.3 GHz, Mediatek MT6753 |
| GPU | Adreno 405 | Adreno 405 | - |
| RAM | 2 GB | 2 GB | 3 GB |
| Internal Memory | 16 GB | 16/32 GB | 32 GB |
| External Memory | microSD, up to 128 GB | No | microSD |
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| Type | LCD Capacitive Touchscreen | IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.5 inches | 5.0 inches | 5.5 inches |
| Resolution | 720 x 1280 pixels (267 ppi) | 1080 x 1920 pixels (441 ppi) | 720 x 1280 pixels (267 ppi) |
| Screen-to-Body Ratio | 67.20% | 71.57% | 68.85% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | FM radio | FM Radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4160 x 3120 pixels | 13 MP, 4128 x 3096 pixels | 8 MP, 3264 x 2448 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/smile Detection, Panorama, HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama |
| Video | 1080p@30fps, 720p@60fps | 1080p@30fps | Yes |
| Front Camera | 8 MP, 1080p [Similar] | 5 MP [Similar] | 8 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSPA, LTE | HSPA, LTE |
| Bluetooth | v4.0, A2DP | v4.0, A2DP | v4.0, A2DP |
| Wi-Fi | 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, hotspot | Yes |
| USB | microUSB v2.0 | microUSB v2.0 | microUSB v2.0, USB On-The-Go |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS | Yes, with A-GPS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 16 GB, 2 GB RAM | 16/32 GB, 2 GB RAM | 32 GB, 3 GB RAM |
| Expandable Storage | microSD, up to 128 GB | No | microSD |
| 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 | Non-removable Li-Po Battery | Li-Po Battery | Li-Ion Battery |
| Capacity | 2600 mAh | 3120 mAh | 4000 mAh |
| Stand by | Up to 424 h (3G) | - | - |
| Talk Time | Up to 22 h 24 min (3G) | - | - |
