Phone Comparison - Xiaomi Redmi 2 vs Asus Zenfone 2 ZE551ML vs Acer Iconia One 8 B1-820
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| Manufacturer | Xiaomi | Asus | Acer |
| Announced | January 2015 | January 2015 | April 2015 |
| Status | Available - January 2015 | Available - March 2015 | Coming Soon - April 2015 |
| Price | Rs. 5,999 ($88.22) [Similarly Priced] | Rs. 14,999 ($220.57) [Similarly Priced] | Rs. 5,180 ($75.99) [Similarly Priced] |
| Colors | Black, White, Yellow, Pink, Green | Osmium Black, Sheer Gold, Glacier Gray, Glamor Red, Ceramic Whit | Various |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
134 x 67.2 x 9.4 mm (5.28 x 2.65 x 0.37 in) |
152.5 x 77.2 x 10.9 mm (6 x 3.04 x 0.43 in) |
213.9 x 127.7 x 9.5 mm (8.42 x 5.03 x 0.37 in) |
| Weight | 133 g (4.69 oz) | 170 g (6 oz) | 355 g (12.52 oz) |
| 2G Network | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | N/A |
| 3G Network | HSDPA 850 / 1900 / 2100 TD-SCDMA 1900 / 2100 |
HSDPA 850 / 900 / 1900 / 2100 | N/A |
| 4G Network | LTE 1800 / 2600 TD-LTE 1900 / 2300 / 2500 / 2600 (Bands 3, 7, 38, 39, 40, 41) | LTE 700 / 800 / 850 / 900 / 1700 / 1800 / 1900 / 2100 / 2600 (Bands 1, 2, 3, 4, 5, 7, 8, 9, 17, 18, 19, 20, 28, 29) |
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| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | , Push Mail, EMail, IM |
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| OS | Android OS, v4.4 (KitKat) | Android OS, v5.0 (Lollipop) | Android OS, v5.0 (Lollipop) |
| Processor | Quad-core 1.2 GHz Cortex-A53, Qualcomm MSM8916 Snapdragon 410 | Quad-core 2.3 GHz Quad-core 1.8 GHz, Intel Atom Z3580 Intel Atom Z3560 |
Quad-core 1.83 GHz, Intel Atom Z3735G |
| GPU | Adreno 306 | PowerVR G6430 | - |
| RAM | 1 GB | 2/4 GB | 1 GB |
| Internal Memory | 8 GB | 16/32/64 GB | 16/32 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 64 GB | microSD, up to 32 GB |
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| Type | IPS LCD Capacitive Touchscreen | IPS Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | - |
| Size | 4.7 inches | 5.5 inches | 8.0 inches |
| Resolution | 720 x 1280 pixels (312 ppi) | 1080 x 1920 pixels (401 ppi) | 800 x 1280 pixels (189 ppi) |
| Screen-to-Body Ratio | 67.83% | 70.67% | 67.71% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio | Yes | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264 x 2448 pixels | 13 MP, 4128 x 3096 pixels | 5 MP, 2592 х 1944 pixels |
| Flash | LED flash | dual-LED (dual tone) | No |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR, Sony Sensor, Panorama, Real-time HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR | Yes |
| Video | Yes, 1080p | 1080p@30fps | Yes |
| Front Camera | 2 MP, 720p [Similar] | 5 MP [Similar] | VGA [Similar] |
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| GPRS | Yes | Yes | No |
| Edge | Yes | Yes | No |
| 3G | HSPA, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | No |
| Bluetooth | v4.0, A2DP | v4.0, A2DP, EDR | v4.0 |
| Wi-Fi | Wi-Fi 802.11 b/g/n, hotspot | Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, hotspot | Wi-Fi 802.11 b/g/n |
| USB | microUSB v2.0 | microUSB v2.0, USB Host | microUSB v2.0 |
| GPS | Yes, with A-GPS, GLONASS, Beidou | Yes, with A-GPS, GLONASS | No |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB, 1 GB RAM / 16 GB, 2 GB RAM | 16/32/64 GB, 2/4 GB RAM | 16/32 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 64 GB | microSD, up to 32 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 | Li-Po Battery | Non-removable Li-Po Battery | - |
| Capacity | 2200 mAh | 3000 mAh | 4550 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | Up to 8 h 30 min (multimedia) |
