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| Phone | Nokia N81 | Motorola Droid Pro | Microsoft Lumia 550 |
| Current U.S. Carriers | (none) | (none) | (none) |
| Global Availability | Released | Released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size |
2.4" diag. 4 : 3 |
3.1" diag. 5 : 3 |
4.7" diag. 16 : 9 |
| Display Resolution & Type |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
320 x 480 pixels (~186 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~312 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | ? |
| Battery | 1,050 mAh | 1,420 mAh | 2,100 mAh |
| Processor | 369 MHz ARM 11 | 1 GHz TI OMAP3620 | 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) |
| RAM | ? | ? | 1 GB |
| Storage | 8 GB * | ? raw hardware | 8 GB |
| Main Camera | 2 megapixel | 5 megapixel | 5 megapixel |
| Wide Camera | - | - | - |
| Tele Camera | - | - | - |
| Video Capture | VGA (640 x 480) | WVGA / 480p | 720p HD |
| Front Camera | - | - | 2 megapixel |
| Weight |
4.94 oz (140g) |
4.73 oz (134g) |
5.01 oz (142g) |
| Dimensions |
4.02" x 1.97" x 0.7" (102 x 50 x 17.8 mm) |
4.69" x 2.36" x 0.46" (119 x 60 x 11.7 mm) |
5.36" x 2.67" x 0.39" (136 x 68 x 9.9 mm) |
| Platform / OS | S60 (Symbian) | Android | Windows |
| Network Bands |
WCDMA: 1 GSM: 850, 900, 1800, 1900 |
WCDMA: 1, 2, 5 CDMA: 850, 1900 GSM: 850, 900, 1800, 1900 |
4G LTE: 2, 4, 5, 7, 12, 17 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | EDGE | EVDO rA | LTE (Cat 4) |
| Features | |||
| Flashlight | - | - | Yes |
| Accessibility | |||
| Hearing Aid Compatible | - |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M3, T4 (very tele-coil compatible) |
| TTY/TDD (Digital) | - | Yes | Yes |
| Alerts | |||
| Ringer Profiles | Yes | - | - |
| Connectivity | |||
| Bluetooth | Yes | Yes | Yes |
| USB |
Yes Micro-USB |
Yes Micro-USB |
Yes Micro-USB |
| Wi-Fi |
Yes 802.11 b,g |
Yes 4 (802.11 b,g,n) |
Yes 4 (802.11 b,g,n) |
| Input | |||
| Side Keys | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | Yes | - |
| Touch Screen | - |
Yes Capacitive |
Yes Capacitive |
| Memory | |||
| Memory Card Slot | Yes * | Yes | Yes |
| Music | |||
| FM Radio | Yes | - | Yes |
| Headphone Jack (3.5mm) | Yes | Yes | Yes |
| Stereo Speakers | Yes | - | - |
| Photo & Video | |||
| DLNA | - | Yes | - |
| Voice | |||
| HD Voice | - | - | Yes |
| Push-To-Talk | Yes * | - | - |
| Speaker Phone | Yes | Yes | Yes |
| * Some versions only | |||
| Nokia N81 | Motorola Droid Pro | Microsoft Lumia 550 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Nokia N81 | Motorola Droid Pro | Microsoft Lumia 550 |
