Phone Comparison - Xiaomi Mi 4 vs Samsung Galaxy Alpha vs Xiaomi Redmi 2A
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| Manufacturer | Xiaomi | Samsung | Xiaomi |
| Announced | July 2014 | August 2014 | March 2015 |
| Status | Available - Q3 2014 | Available - September 2014 | Available - March 2015 |
| Price | - | - | Rs. 5,999 ($88.22) [Similarly Priced] |
| Colors | Black, White | Black, white, gold, silver, blue | Black, White, Yellow, Pink, Green |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
139.2 x 68.5 x 8.9 mm (5.48 x 2.7 x 0.35 in) |
132.4 x 65.5 x 6.7 mm (5.21 x 2.58 x 0.26 in) |
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| Weight | 149 g (5.26 oz) | 115 g (4.06 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 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 1900 / 2100 TD-SCDMA 1900 / 2100 |
| 4G Network | LTE | LTE | LTE 1800 / 2600 TD-LTE 1900 / 2300 / 2500 / 2600 (Bands 3, 7, 38, 39, 40, 41) |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.4.3 (KitKat) | Android OS, v4.4.4 (KitKat) | Android OS, v4.4 (KitKat) |
| Processor | Quad-core 2.5 GHz Krait 400, Qualcomm MSM8974AC Snapdragon 801 | Quad-core 1.8 GHz Cortex-A15 & quad-core 1.3 GHz Cortex-A7, Exynos 5 Octa 5430 | Quad-core 1.5 GHz, LCI L1860C |
| GPU | Adreno 330 | Mali-T628 MP6 | Mali-T628 MP4 |
| RAM | 3 GB | 2 GB | 1 GB |
| Internal Memory | 16/64 GB | 32 GB | 8 GB |
| External Memory | No | No | microSD, up to 32 GB |
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| Type | IPS LCD capacitive touchscreen | Super AMOLED capacitive touchscreen | IPS LCD Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.0 inches | 4.7 inches | 4.7 inches |
| Resolution | 1080 x 1920 pixels (441 ppi) | 720 x 1280 pixels (320 ppi) | 720 x 1280 pixels (312 ppi) |
| Screen-to-Body Ratio | 72.14% | 66.95% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | No | FM Radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4128 x 3096 pixels | 12 MP, 4128 x 3096 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | Dual-LED Flash | LED flash | LED flash |
| Features | Auto focus, 1/3' Sensor Size, 1.12µm Pixel Size, Geo-tagging, Touch Focus, Face And Smile Detection, HDR | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, Panorama, HDR | Auto focus, f/2.2 Aperture, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama, BSI Sensor, Omnivision sensor |
| Video | 2160p, 1080p@30fps, HDR | 2160p@30fps | Yes, 1080p |
| Front Camera | 8 MP, 1080p@30fps [Similar] | 2.1 MP [Similar] | 2 MP, 720p [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE | HSDPA, 42 Mbps, HSUPA; LTE-A, Cat6, 300 Mbps DL | HSPA, LTE Cat4 150/50 Mbps |
| Bluetooth | v4.0, A2DP | v4.0, A2DP, EDR, LE | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, hotspot |
| USB | microUSB v2.0 (MHL), USB On-the-go | microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 16/64 GB, 3 GB RAM | 32 GB, 2 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | No | No | 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 | Non-removable Li-Ion Battery | Li-Ion Battery | Li-Po Battery |
| Capacity | 3080 mAh | 1860 mAh | 2200 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
