Phone Comparison - Samsung I9100 Galaxy S II vs Samsung Galaxy Ace vs Samsung Galaxy Nexus
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| Manufacturer | Samsung | Samsung | Samsung |
| Announced | February 2011 | January 2011 | October 2011 |
| Status | Available - April 2011 | Available - February 2011 | Available - November 2011 |
| Colors | Black, White, Pink | Black, Hugo Boss Edition | Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
125.3 x 66.1 x 8.5 mm (4.93 x 2.6 x 0.33 in) |
112.4 x 59.9 x 11.5 mm (4.43 x 2.36 x 0.45 in) |
135.5 x 67.9 x 8.9 mm (5.33 x 2.67 x 0.35 in) |
| Weight | 116 g (4.09 oz) | 113 g (3.99 oz) | 135 g (4.76 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 / 2100 | HSDPA 850 / 900 / 1700 / 1900 / 2100 |
| 4G Network | - | - | LTE 700 (region specific) |
| Messaging | SMS, MMS, IM | SMS, MMS | SMS, MMS, IM |
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| OS | Android OS, v2.3 (Gingerbread), planned upgrade to v4.0 | Android OS, v2.2 (Froyo), upgradable to v2.3 | Android OS, v4.0 (Ice Cream Sandwich) |
| Processor | Dual-core 1.2GHz ARM Cortex-A9 processor, Exynos chipset | 800 MHz ARM 11 processor, Qualcomm MSM7227 chipset | Dual-core 1.2GHz Cortex-A9 CPU, TI OMAP 4460 chipset |
| GPU | Mali-400MP | Adreno 200 | No |
| RAM | 1 GB | N/A | 1 GB |
| Internal Memory | 16 GB/32 GB storage | 158 MB storage | 16/32 GB storage |
| External Memory | microSD, up to 32GB, 8 GB included | microSD, up to 32GB, 2GB included, 280MB RAM | No |
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| Type | Super AMOLED Plus capacitive touchscreen | TFT capacitive touchscreen | Super AMOLED capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.3 inches | 3.5 inches | 4.65 inches |
| Resolution | 480 x 800 pixels (217 ppi) | 320 x 480 pixels (165 ppi) | 720 x 1280 pixels (316 ppi) |
| Screen-to-Body Ratio | 63.52% | 54.06% | 64.72% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio with RDS | Stereo 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, 2592x1944 pixels | 5 MP, 2592x1936 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, Face And Smile Detection | Auto focus, Touch Focus, Geo-tagging, Face Detection |
| Video | Yes, 1080p@30fps | Yes, QVGA@15fps | Yes, 1080p@30fps |
| Front Camera | Yes, 2 MP [Similar] | No [Similar] | Yes, 1.3 MP [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, 7.2 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE |
| Bluetooth | Yes, v3.0+HS | Yes, v2.1 with A2DP | Yes, v3.0 with A2DP |
| 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 | Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, Wi-Fi hotspot |
| USB | Yes, v2.0 microUSB (MHL), USB On-the-go | Yes, v2.0 microUSB | Yes, v2.0 microUSB |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support, barometer sensor |
| Browser | HTML | HTML | HTML |
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| Internal | 16GB/32GB storage, 1 GB RAM | 158 MB storage | 16/32GB storage, 1 GB RAM |
| Expandable Storage | microSD, up to 32GB, 8 GB included | microSD, up to 32GB, 2GB included, 280MB RAM | 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 | Standard battery, Li-Ion |
| Capacity | 1650 mAh | 1350 mAh | 1750 mAh |
| Stand by | Up to 710 h (2G) Up to 610 h (3G) |
Up to 640 h (2G) Up to 420 h (3G) |
Up to 290 h (2G) Up to 270 h (3G) |
| Talk Time | Up to 18 h 20 min (2G) Up to 8 h 40 min (3G) |
Up to 11 h (2G) Up to 6 h 30 min (3G) |
Up to 17 h 40 min (2G) Up to 8 h 20 min (3G) |
