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| Phone | Samsung SGH-X640 | Nokia Lumia 521 / 520 | Samsung DoubleTime | ZTE Blade Vantage | LG VX-8360 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released | Released |
| Specifications | |||||
|---|---|---|---|---|---|
| Display Size | ? |
4" diag. 5 : 3 |
3.2" diag. 5 : 3 |
5" diag. 16 : 9 |
2" diag. 4 : 3 |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
320 x 480 pixels (~180 ppi) LCD (TFT/TFD) |
480 x 854 pixels (~196 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~200 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | 60 Hz | 60 Hz | ? |
| Battery | 800 mAh | 1,430 mAh | 1,200 mAh | 2,500 mAh | 1,000 mAh |
| Processor | ? | 1 GHz Qualcomm Snapdragon S4 MSM8270 | 600 MHz Qualcomm | 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) | ? |
| RAM | ? | 512 MB | ? | 2 GB | ? |
| Storage | ? raw hardware | 8 GB | ? raw hardware | 16 GB | ? raw hardware |
| Main Camera | Yes | 5 megapixel | 3 megapixel | 8 megapixel | 1 megapixel |
| Wide Camera | - | - | - | - | - |
| Tele Camera | - | - | - | - | - |
| Video Capture | - | 720p HD | QVGA (320 x 240) | 720p HD | QCIF (176 x 144) |
| Front Camera | - | - | - | 2 megapixel | - |
| Weight |
3 oz (85g) |
4.39 oz (124g) |
5.22 oz (148g) |
5.29 oz (150g) |
3.35 oz (95g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm) |
4.45" x 2.44" x 0.59" (113 x 62 x 15 mm) |
5.73" x 2.85" x 0.36" (146 x 72 x 9.2 mm) |
3.64" x 1.91" x 0.78" (92 x 49 x 19.8 mm) |
| Form Factor | Clamshell | Slab | Clamshell | Slab | Clamshell |
| Platform / OS | (proprietary) | Windows | Android | Android | (proprietary) |
| Network Bands |
GSM: 900, 1800, 1900 |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
4G LTE: 2, 4, 5, 13 |
CDMA: 850, 1900 |
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| Data Technology | GPRS | HSPA+ 21 | HSPA 7.2 | LTE (Cat 4) | EVDO r0 |
| Features | |||||
| Flashlight | - | - | - | Yes | - |
| GPS / Location | - | n/a | n/a | n/a | Yes |
| Accessibility | |||||
| Hearing Aid Compatible | - |
Yes M3, T4 (very tele-coil compatible) |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | Yes | n/a | n/a | n/a | Yes |
| TTY/TDD (Digital) | - | Yes | Yes | Yes | Yes |
| Alerts | |||||
| Extra Display | - | - | - | - | Yes |
| Connectivity | |||||
| Bluetooth | - | Yes | Yes | Yes | Yes |
| Mobile Hotspot | - | n/a | n/a | n/a | - |
| USB | - | Yes |
Yes Micro-USB |
Yes Micro-USB |
Yes |
| Wi-Fi | - | Yes |
Yes 4 (802.11 b,g,n) |
Yes 4 (802.11 b,g,n) |
- |
| Contacts | |||||
| Picture ID | Yes | n/a | n/a | n/a | Yes |
| Ringer ID | Yes | n/a | n/a | n/a | Yes |
| Voice Dialing | - | n/a | n/a | n/a | Yes |
| Customization | |||||
| Custom Graphics | Yes | n/a | n/a | n/a | Yes |
| Custom Ringtones | Yes | n/a | n/a | n/a | Yes |
| Real-Music Ringers | - | n/a | n/a | n/a | Yes |
| Data & Network | |||||
| Data Tethering | - | n/a | n/a | n/a | Yes |
| WAP / Web Browser | Yes | n/a | n/a | n/a | Yes |
| Input | |||||
| Predictive Text Entry | Yes | n/a | n/a | n/a | Yes |
| Side Keys | Yes | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | - | Yes | - | - |
| Touch Screen | - |
Yes Capacitive |
Yes Capacitive |
Yes Capacitive |
- |
| Memory | |||||
| Memory Card Slot | - | Yes | Yes | Yes | Yes |
| Messaging | |||||
| Email Client | - | n/a | n/a | n/a | - |
| EMS / Picture Messaging | Yes | n/a | n/a | n/a | - |
| Instant Messaging | - | n/a | n/a | n/a | - |
| MMS | Yes | n/a | n/a | n/a | Yes |
| Text Messaging Templates | Yes | n/a | n/a | n/a | Yes |
| Music | |||||
| Headphone Jack (3.5mm) | - | Yes | Yes | Yes | - |
| Music Player | - | n/a | n/a | n/a | Yes |
| Stereo Speakers | - | - | - | - | Yes |
| Productivity | |||||
| Alarm | Yes | n/a | n/a | n/a | Yes |
| Calculator | Yes | n/a | n/a | n/a | Yes |
| Calendar | Yes | n/a | n/a | n/a | Yes |
| To-Do List | Yes | n/a | n/a | n/a | - |
| Voice Memo | Yes | n/a | n/a | n/a | Yes |
| Software | |||||
| BREW | - | n/a | n/a | n/a | Yes |
| Games | Yes | n/a | n/a | n/a | Yes |
| Java (J2ME) | Yes | n/a | n/a | n/a | - |
| Voice | |||||
| HD Voice | - | - | - | Yes | - |
| Headset Jack (2.5 mm) | Yes | n/a | n/a | n/a | Yes |
| Speaker Phone | Yes | Yes | Yes | Yes | Yes |
| Samsung SGH-X640 | Nokia Lumia 521 / 520 | Samsung DoubleTime | ZTE Blade Vantage | LG VX-8360 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | Nokia Lumia 521 / 520 | Samsung DoubleTime | ZTE Blade Vantage | LG VX-8360 |
