Phone Comparison - Samsung I9100 Galaxy S II vs Asus Zenfone 5 vs Xiaomi Redmi 1S
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| Manufacturer | Samsung | Asus | Xiaomi |
| Announced | February 2011 | January 2014 | May 2014 |
| Status | Available - April 2011 | Available - June 2014 | Available - May 2014 |
| Colors | Black, White, Pink | Black, White, Red, Blue, Gold | Black, Chinese Red, Metallic Gray/ blue, green, yellow panels |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
125.3 x 66.1 x 8.5 mm (4.93 x 2.6 x 0.33 in) |
148.2 x 72.8 x 5.5-10.3 (5.83 x 2.87 x 0.22-0.41) |
137 x 69 x 9.9 mm (5.39 x 2.72 x 0.39 in) |
| Weight | 116 g (4.09 oz) | 140 g (4.94 oz) | 158 g (5.57 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 1900 / 2100 |
| Messaging | SMS, MMS, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v2.3 (Gingerbread), planned upgrade to v4.0 | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v4.3 (Jelly Bean) |
| Processor | Dual-core 1.2GHz ARM Cortex-A9 processor, Exynos chipset | Dual-core 2.0 GHz / Dual-core 1.6 GHz, Intel Atom Z2580/Z2560 | Quad-core 1.6 GHz Cortex-A7, Qualcomm MSM8228 Snapdragon |
| GPU | Mali-400MP | PowerVR SGX544MP2 | Adreno 305 |
| RAM | 1 GB | 1/2 GB | 1 GB |
| Internal Memory | 16 GB/32 GB storage | 8/16 GB | 8 GB |
| External Memory | microSD, up to 32GB, 8 GB included | microSD, up to 64 GB | microSD, up to 32 GB |
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| Type | Super AMOLED Plus capacitive touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 2 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.3 inches | 5.0 inches | 4.7 inches |
| Resolution | 480 x 800 pixels (217 ppi) | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (312 ppi) |
| Screen-to-Body Ratio | 63.52% | 63.76% | 64.61% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio with RDS | FM Radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264x2448 pixels | 8 MP, 3264 x 2448 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, Image Stabilization | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, 1.4 µm Pixel Size, Geo-tagging, Touch Focus, Face And Smile Detection, HDR |
| Video | Yes, 1080p@30fps | Yes | 1080p@30fps |
| Front Camera | Yes, 2 MP [Similar] | Yes, 2 MP [Similar] | 1.3 MP, 720p@30fps [Similar] |
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| GPRS | Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps | Yes | Yes |
| Edge | Class 12 | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, HSUPA |
| Bluetooth | Yes, v3.0+HS | Yes, v4.0 with A2DP, EDR | v4.0, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, DLNA, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, v2.0 microUSB (MHL), USB On-the-go | Yes, microUSB v2.0 | microUSB v2.0, USB On-the-go |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS |
| Browser | HTML | HTML | HTML5 |
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| Internal | 16GB/32GB storage, 1 GB RAM | 8/16 GB, 1/2 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32GB, 8 GB included | microSD, up to 64 GB | microSD, up to 32 GB |
| USB OTG | Supported | - | 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 | Standard battery, Li-Ion | Non-removable Li-Po Battery | Li-Po Battery |
| Capacity | 1650 mAh | 2110 mAh | 2000 mAh |
| Stand by | Up to 710 h (2G) Up to 610 h (3G) |
Up to 353 h (3G) | - |
| Talk Time | Up to 18 h 20 min (2G) Up to 8 h 40 min (3G) |
Up to 18 h 30 min (3G) | - |
