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| Phone | Palm Treo 650 (CDMA) | ZTE Blade Vantage | Pantech Duo C810 | Nokia Lumia 521 / 520 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
5" diag. 16 : 9 |
2.2" diag. 4 : 3 |
4" diag. 5 : 3 |
| Display Resolution & Type |
320 x 320 pixels LCD (TFT/TFD) |
480 x 854 pixels (~196 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~182 ppi) LCD (TFT/TFD) |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | ? | ? |
| Battery | ? | 2,500 mAh | 1,320 mAh | 1,430 mAh |
| Processor | 312 MHz Intel XScale PXA270 | 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) | ARM 920t PXA27x | 1 GHz Qualcomm Snapdragon S4 MSM8270 |
| RAM | ? | 2 GB | ? | 512 MB |
| Storage | ? raw hardware | 16 GB | ? raw hardware | 8 GB |
| Main Camera | Yes | 8 megapixel | 1 megapixel | 5 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | QVGA (320 x 240) | 720p HD | QVGA (320 x 240) | 720p HD |
| Front Camera | - | 2 megapixel | - | - |
| Weight |
6.3 oz (179g) |
5.29 oz (150g) |
3.88 oz (110g) |
4.39 oz (124g) |
| Dimensions |
4.4" x 2.3" x 0.9" (112 x 58 x 22.9 mm) |
5.73" x 2.85" x 0.36" (146 x 72 x 9.2 mm) |
4.01" x 1.97" x 0.78" (102 x 50 x 19.8 mm) |
4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm) |
| Platform / OS | Palm OS | Android | Windows Mobile Standard | Windows |
| Network Bands |
CDMA: 850, 1900 |
4G LTE: 2, 4, 5, 13 |
WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 |
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| Data Technology | 1xRTT | LTE (Cat 4) | HSDPA 1.8 | HSPA+ 21 |
| Features | ||||
| Flashlight | - | Yes | - | - |
| Accessibility | ||||
| Hearing Aid Compatible | - |
Yes M4, T4 (very tele-coil compatible) |
- |
Yes M3, T4 (very tele-coil compatible) |
| TTY/TDD (Digital) | - | Yes | - | Yes |
| Alerts | ||||
| Ringer Profiles | - | - | Yes | - |
| Connectivity | ||||
| Bluetooth | Yes | Yes | Yes | Yes |
| Infrared (IR) | Yes | - | - | - |
| USB | - |
Yes Micro-USB |
Yes | Yes |
| Wi-Fi | - |
Yes 4 (802.11 b,g,n) |
- | Yes |
| Input | ||||
| Side Keys | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | Yes | - | Yes | - |
| Touch Screen | Yes |
Yes Capacitive |
- |
Yes Capacitive |
| Memory | ||||
| Memory Card Slot | Yes | Yes | Yes | Yes |
| Music | ||||
| Headphone Jack (3.5mm) | - | Yes | - | Yes |
| Voice | ||||
| HD Voice | - | Yes | - | - |
| Speaker Phone | Yes | Yes | Yes | Yes |
| Palm Treo 650 (CDMA) | ZTE Blade Vantage | Pantech Duo C810 | Nokia Lumia 521 / 520 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Palm Treo 650 (CDMA) | ZTE Blade Vantage | Pantech Duo C810 | Nokia Lumia 521 / 520 |
