Phone Comparison - Samsung I9100 Galaxy S II vs Samsung I9000 Galaxy S vs Samsung Galaxy Alpha
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| Manufacturer | Samsung | Samsung | Samsung |
| Announced | February 2011 | March 2010 | August 2014 |
| Status | Available - April 2011 | Available - June 2010 | Available - September 2014 |
| Colors | Black, White, Pink | Black, White | Black, white, gold, silver, blue |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
125.3 x 66.1 x 8.5 mm (4.93 x 2.6 x 0.33 in) |
122.4 x 64.2 x 9.9 mm (4.82 x 2.53 x 0.39 in) |
132.4 x 65.5 x 6.7 mm (5.21 x 2.58 x 0.26 in) |
| Weight | 116 g (4.09 oz) | 119 g (4.2 oz) | 115 g (4.06 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | - | - | LTE |
| Messaging | SMS, MMS, IM | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v2.3 (Gingerbread), planned upgrade to v4.0 | Android OS, v2.1 (Eclair), upgradable to v2.3 | Android OS, v4.4.4 (KitKat) |
| Processor | Dual-core 1.2GHz ARM Cortex-A9 processor, Exynos chipset | 1 GHz Cortex-A8, Hummingbird | Quad-core 1.8 GHz Cortex-A15 & quad-core 1.3 GHz Cortex-A7, Exynos 5 Octa 5430 |
| GPU | Mali-400MP | PowerVR SGX540 | Mali-T628 MP6 |
| RAM | 1 GB | 512 MB | 2 GB |
| Internal Memory | 16 GB/32 GB storage | 8 GB/16 GB storage | 32 GB |
| External Memory | microSD, up to 32GB, 8 GB included | microSD, up to 32GB | No |
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| Type | Super AMOLED Plus capacitive touchscreen | Super AMOLED capacitive touchscreen | Super AMOLED capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.3 inches | 4.0 inches | 4.7 inches |
| Resolution | 480 x 800 pixels (217 ppi) | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (320 ppi) |
| Screen-to-Body Ratio | 63.52% | 58.07% | 66.95% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio with RDS | FM radio with RDS | No |
| Games | Yes + Downloadable | Yes | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264x2448 pixels | 5 MP, 2592 x 1944 pixels | 12 MP, 4128 x 3096 pixels |
| Flash | LED flash | No | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, Image Stabilization | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, Panorama, HDR |
| Video | Yes, 1080p@30fps | Yes, 720p@30fps | 2160p@30fps |
| Front Camera | Yes, 2 MP [Similar] | Yes, VGA [Similar] | 2.1 MP [Similar] |
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| GPRS | Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps | Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps | Yes |
| Edge | Class 12 | Class 12 | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 7.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, 42 Mbps, HSUPA; LTE-A, Cat6, 300 Mbps DL |
| Bluetooth | Yes, v3.0+HS | Yes, v3.0 with A2DP | v4.0, A2DP, EDR, 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, DLNA, Wi-Fi hotspot (Android 2.2) | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot |
| USB | Yes, v2.0 microUSB (MHL), USB On-the-go | Yes, v2.0 microUSB | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS, GLONASS |
| Browser | HTML | WAP 2.0/xHTML, HTML, Adobe flash | HTML5 |
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| Internal | 16GB/32GB storage, 1 GB RAM | 8 GB/16 GB storage, 512 MB RAM | 32 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 32GB, 8 GB included | microSD, up to 32GB | No |
| 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 | Standard battery, Li-Ion | Standard battery, Li-Ion | Li-Ion Battery |
| Capacity | 1650 mAh | 1500 mAh | 1860 mAh |
| Stand by | Up to 710 h (2G) Up to 610 h (3G) |
Up to 750 h (2G) Up to 576 h (3G) |
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| Talk Time | Up to 18 h 20 min (2G) Up to 8 h 40 min (3G) |
Up to 13 h 30 min (2G) Up to 6 h 30 min (3G) |
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