Phone Comparison - Samsung I9100 Galaxy S II vs Xiaomi Redmi 2 vs Asus Zenfone Go ZB450KL
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| Manufacturer | Samsung | Xiaomi | Asus |
| Announced | February 2011 | January 2015 | July 2016 |
| Status | Available - April 2011 | Available - January 2015 | Available - August 2016 |
| Price | - | Rs. 5,999 ($88.22) [Similarly Priced] | Rs. 6,999 ($99.00) [Similarly Priced] |
| Colors | Black, White, Pink | Black, White, Yellow, Pink, Green | Glamour Red, Silver Blue, Gold Silver |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
125.3 x 66.1 x 8.5 mm (4.93 x 2.6 x 0.33 in) |
134 x 67.2 x 9.4 mm (5.28 x 2.65 x 0.37 in) |
136.5 x 66.7 x 11.2 mm (5.37 x 2.63 x 0.44 in) |
| Weight | 116 g (4.09 oz) | 133 g (4.69 oz) | 136.5 g (4.8.0.18 oz) |
| SIM Type | - | - | Dual-SIM |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 900 / 1800 - Taiwan, Europe |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 1900 / 2100 TD-SCDMA 1900 / 2100 |
HSDPA 850 / 900 / 2100 - Global, India HSDPA 900 / 2100 - Taiwan, Europe |
| 4G Network | - | LTE 1800 / 2600 TD-LTE 1900 / 2300 / 2500 / 2600 (Bands 3, 7, 38, 39, 40, 41) | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900) - Global |
| Messaging | SMS, MMS, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v2.3 (Gingerbread), planned upgrade to v4.0 | Android OS, v4.4 (KitKat) | Android OS, v6.0 (Marshmallow) |
| Processor | Dual-core 1.2GHz ARM Cortex-A9 processor, Exynos chipset | Quad-core 1.2 GHz Cortex-A53, Qualcomm MSM8916 Snapdragon 410 | Quad-core 1.2 GHz Cortex-A53, Qualcomm MSM8916 Snapdragon 410 |
| GPU | Mali-400MP | Adreno 306 | Adreno 306 |
| RAM | 1 GB | 1 GB | 1 GB |
| Internal Memory | 16 GB/32 GB storage | 8 GB | 8 GB |
| External Memory | microSD, up to 32GB, 8 GB included | microSD, up to 32 GB | microSD, up to 128 GB |
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| Type | Super AMOLED Plus capacitive touchscreen | IPS LCD Capacitive Touchscreen | IPS LCD Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.3 inches | 4.7 inches | 4.5 inches |
| Resolution | 480 x 800 pixels (217 ppi) | 720 x 1280 pixels (312 ppi) | 480 x 854 pixels (218 ppi) |
| Screen-to-Body Ratio | 63.52% | 67.83% | 61.12% |
| 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 |
| 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, HDR, Sony Sensor, Panorama, Real-time HDR | Autofocus, f/2.0, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama |
| Video | Yes, 1080p@30fps | Yes, 1080p | Yes |
| Front Camera | Yes, 2 MP [Similar] | 2 MP, 720p [Similar] | 2 MP, f/2.4 [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 | HSPA, LTE Cat4 150/50 Mbps | HSPA 21.1/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | Yes, v3.0+HS | v4.0, A2DP | v4.0, A2DP, EDR |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, DLNA, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| USB | Yes, v2.0 microUSB (MHL), USB On-the-go | microUSB v2.0 | microUSB v2.0, USB On-The-Go |
| GPS | Yes, with A-GPS support | Yes, with A-GPS, GLONASS, Beidou | Yes, with A-GPS, GLONASS, BDS |
| Browser | HTML | HTML5 | HTML |
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| Internal | 16GB/32GB storage, 1 GB RAM | 8 GB, 1 GB RAM / 16 GB, 2 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32GB, 8 GB included | microSD, up to 32 GB | microSD, up to 128 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 | Li-Po Battery | Removable Li-Po Battery |
| Capacity | 1650 mAh | 2200 mAh | 2070 mAh |
| Stand by | Up to 710 h (2G) Up to 610 h (3G) |
- | - |
| Talk Time | Up to 18 h 20 min (2G) Up to 8 h 40 min (3G) |
- | - |
