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| Phone | Nokia Lumia 521 / 520 | Samsung Ace SPH-i325 | ZTE Imperial II | BlackBerry 7750 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
4" diag. 5 : 3 |
2.3" diag. 4 : 3 |
5" diag. 16 : 9 |
? |
| Display Resolution & Type |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
320 x 240 pixels (~174 ppi) LCD (TFT/TFD) |
540 x 960 pixels (~220 ppi) LCD (TFT/TFD) |
240 x 240 pixels LCD (Color) |
| Display Refresh | ? | ? | 60 Hz | ? |
| Battery | 1,430 mAh | 1,300 mAh | 2,300 mAh | ? |
| Processor | 1 GHz Qualcomm Snapdragon S4 MSM8270 | 416 MHz PXA270 | 1.2 GHz Qualcomm Snapdragon 400 (MSM8926) | ? |
| RAM | 512 MB | ? | 1 GB | ? |
| Storage | 8 GB | ? raw hardware | 8 GB | ? raw hardware |
| Main Camera | 5 megapixel | 1 megapixel | 5 megapixel | - |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | 720p HD | QVGA (320 x 240) | 720p HD | - |
| Front Camera | - | - | 1 megapixel | - |
| Weight |
4.39 oz (124g) |
3.9 oz (111g) |
5.07 oz (144g) |
5.01 oz (142g) |
| Dimensions |
4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm) |
4.65" x 2.32" x 0.46" (118 x 59 x 11.7 mm) |
5.6" x 2.8" x 0.4" (142 x 71 x 10.2 mm) |
4.76" x 3.03" x 0.71" (121 x 77 x 18 mm) |
| Platform / OS | Windows | Windows Mobile Standard | Android | BlackBerry OS |
| Network Bands |
CDMA: 850, 1900 GSM: 900, 1800 |
4G LTE: 2, 4, 5, 12, 17 CDMA: 850, 1900 |
CDMA: 850, 1900 |
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| Data Technology | HSPA+ 21 | EVDO r0 | LTE (Cat 3) | 1xRTT |
| Features | ||||
| Accessibility | ||||
| Hearing Aid Compatible | Yes | Yes | Yes | - |
| TTY/TDD (Digital) | Yes | Yes | Yes | Yes |
| Alerts | ||||
| Ringer Profiles | - | Yes | - | Yes |
| Connectivity | ||||
| Bluetooth | Yes | Yes | Yes | - |
| USB | Yes | Yes |
Yes Micro-USB |
Yes |
| Wi-Fi | Yes | - |
Yes 4 (802.11 b,g,n) |
- |
| Input | ||||
| Side Keys | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | Yes | - | Yes |
| Touch Screen | Yes | - | Yes | - |
| Memory | ||||
| Memory Card Slot | Yes | Yes | Yes | - |
| Music | ||||
| Headphone Jack (3.5mm) | Yes | - | Yes | - |
| Voice | ||||
| Speaker Phone | Yes | Yes | Yes | - |
| Nokia Lumia 521 / 520 | Samsung Ace SPH-i325 | ZTE Imperial II | BlackBerry 7750 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Nokia Lumia 521 / 520 | Samsung Ace SPH-i325 | ZTE Imperial II | BlackBerry 7750 |
