Phone Comparison - Dell Streak 7 Wi-Fi vs Lenovo Vibe Z K910 vs Samsung Galaxy Core 2 Duos
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| Manufacturer | Dell | Lenovo | Samsung |
| Announced | February 2011 | November 2013 | June 2014 |
| Status | Available - April 2011 | Available - January 2014 | Available - July 2014 |
| Colors | Gray | Black | White, Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
200 x 119.8 x 12.4 mm (7.87 x 4.72 x 0.49 in) |
7.9 mm thickness (0.31 in thickness) |
130.3 x 68 x 9.8 mm (5.13 x 2.68 x 0.39 in) |
| Weight | 453.6 g (15.98.0.21 oz) | 147 g (5.19 oz) | 138 g (4.87 oz) |
| 2G Network | N/A | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 2100 | HSDPA 900 / 2100 | |
| 4G Network | - | LTE | - |
| Messaging | , EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v2.2 (Froyo) | Android OS, v4.3 (Jelly Bean) | Android OS, v4.4.2 (KitKat) |
| Processor | Dual-core 1 GHz Cortex-A9, Nvidia Tegra 2 T20 | Quad-core 2.2 GHz Krait 400, Qualcomm Snapdragon 800 | Quad-core 1.2 GHz |
| GPU | ULP GeForce | Adreno 330 | - |
| RAM | N/A | 2 GB | 768 MB |
| Internal Memory | 16 GB storage | 16 GB ROM | 4 GB |
| External Memory | microSD, up to 32GB | microSD, up to 32 GB | microSD, up to 64 GB |
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| Type | TFT capacitive touchscreen | IPS LCD Capacitive Touchscreen | TFT capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 7.0 inches | 5.5 inches | 4.5 inches |
| Resolution | 480 x 800 pixels (133 ppi) | 1080 x 1920 pixels (401 ppi) | 480 x 800 pixels (207 ppi) |
| Screen-to-Body Ratio | 58.45% | - | 65.25% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | - | FM Radio |
| Games | Yes | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592х1944 pixels | 13 MP, 4128 x 3096 pixels | 5 MP, 2592 х 1944 pixels |
| Flash | LED flash | Dual-LED flash | LED flash |
| Features | Auto focus, Geo-tagging | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection |
| Video | Yes, 720p | Yes, 1080p@30fps | Yes |
| Front Camera | Yes, 1.3 MP [Similar] | Yes, 5 MP [Similar] | Yes, VGA [Similar] |
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| GPRS | No | Yes | Yes |
| Edge | No | Yes | Yes |
| 3G | No | DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 150 Mbps DL | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v2.1 with A2DP, EDR | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual band, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot |
| USB | Yes, v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS |
| Browser | HTML, Adobe Flash | HTML5 | HTML |
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| Internal | 16 GB storage | 16 GB ROM, 2 GB RAM | 4 GB, 768 MB RAM |
| Expandable Storage | microSD, up to 32GB | microSD, up to 32 GB | microSD, up to 64 GB |
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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-Ion Battery |
| Capacity | 2780 mAh | - | 2000 mAh |
| Stand by | Up to 72 h | - | - |
| Talk Time | Up to 4 h | - | - |
