Phone Comparison - Samsung I9100 Galaxy S II vs Lenovo S820 vs Oppo R1 R829T
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| Manufacturer | Samsung | Lenovo | Oppo |
| Announced | February 2011 | May 2013 | December 2013 |
| Status | Available - April 2011 | Available - May 2013 | Available - December 2013 |
| Colors | Black, White, Pink | Flamingo red | White, 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) |
139.5 x 69.7 x 9 mm (5.49 x 2.74 x 0.35 in) |
142.7 x 70.4 x 7.1 mm (5.62 x 2.77 x 0.28 in) |
| Weight | 116 g (4.09 oz) | 143 g (5.04 oz) | 140 g (4.94 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 2100 | TD-SCDMA 1880-1920/ 2010-2025 |
| Messaging | SMS, MMS, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail |
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| OS | Android OS, v2.3 (Gingerbread), planned upgrade to v4.0 | Android OS, v4.2 (Jelly Bean) | Android OS, v4.2.1 (Jelly Bean) |
| Processor | Dual-core 1.2GHz ARM Cortex-A9 processor, Exynos chipset | Quad-core 1.2 GHz, MTK 6589W | Quad-core 1.3 GHz, MediaTek MT6582 |
| GPU | Mali-400MP | PowerVR SGX544 | Mali-400MP2 |
| RAM | 1 GB | 1 GB | 1 GB |
| Internal Memory | 16 GB/32 GB storage | 4 GB | 16 GB |
| External Memory | microSD, up to 32GB, 8 GB included | microSD, up to 32 GB | No |
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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 | 5.0 inches |
| Resolution | 480 x 800 pixels (217 ppi) | 720 x 1280 pixels (312 ppi) | 720 x 1280 pixels (294 ppi) |
| Screen-to-Body Ratio | 63.52% | 62.82% | 68.47% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio with RDS | FM radio; built-in antenna | Stereo FM radio with RDS |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264x2448 pixels | 12 MP, 4000 x 3000 pixels | 8 MP, 3264x2448 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, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR |
| Video | Yes, 1080p@30fps | Yes | Yes, 1080p |
| Front Camera | Yes, 2 MP [Similar] | Yes, 2 MP [Similar] | Yes, 5 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, HSUPA | HSPA+ |
| Bluetooth | Yes, v3.0+HS | Yes, v3.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, DLNA, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual band | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, DLNA, Wi-Fi hotspot |
| USB | Yes, v2.0 microUSB (MHL), USB On-the-go | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML | HTML | HTML5 |
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| Internal | 16GB/32GB storage, 1 GB RAM | 4 GB, 1 GB RAM | 16 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32GB, 8 GB included | microSD, up to 32 GB | 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 | Li-Po Battery | Li-Ion Battery |
| Capacity | 1650 mAh | 2000 mAh | 2410 mAh |
| Stand by | Up to 710 h (2G) Up to 610 h (3G) |
Up to 140 h (2G) Up to 140 h (3G) |
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| Talk Time | Up to 18 h 20 min (2G) Up to 8 h 40 min (3G) |
Up to 22 h (2G) Up to 10 h (3G) |
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