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| Phone | Nokia N81 | Samsung Galaxy S II / SGH-i777 | Pantech Matrix Pro C820 |
| Current U.S. Carriers | (none) | (none) | (none) |
| Global Availability | Released | Released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size |
2.4" diag. 4 : 3 |
4.3" diag. 5 : 3 |
2.4" diag. 4 : 3 |
| Display Resolution & Type |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
480 x 800 pixels (~217 ppi) AMOLED |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | ? |
| Battery | 1,050 mAh | 1,650 mAh | 1,320 mAh |
| Processor | 369 MHz ARM 11 | 1.2 GHz Samsung Exynos dual-core | 528 MHz ARM 11 |
| RAM | ? | ? | ? |
| Storage | 8 GB * | 16 GB | ? raw hardware |
| Main Camera | 2 megapixel | 8 megapixel | 2 megapixel |
| Wide Camera | - | - | - |
| Tele Camera | - | - | - |
| Video Capture | VGA (640 x 480) | 1080p HD | QCIF (176 x 144) |
| Front Camera | - | 2 megapixel | - |
| Weight |
4.94 oz (140g) |
4.3 oz (122g) |
5.34 oz (151g) |
| Dimensions |
4.02" x 1.97" x 0.7" (102 x 50 x 17.8 mm) |
4.96" x 2.6" x 0.35" (126 x 66 x 8.9 mm) |
4.2" x 2" x 0.9" (107 x 51 x 22.9 mm) |
| Platform / OS | S60 (Symbian) | Android | Windows Mobile Standard |
| Network Bands |
WCDMA: 1 GSM: 850, 900, 1800, 1900 |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | EDGE | HSPA+ 21 | HSDPA 3.6 |
| Features | |||
| Accessibility | |||
| Hearing Aid Compatible | - |
Yes M3 (mostly compatible) |
- |
| TTY/TDD (Digital) | - | Yes | Yes |
| Alerts | |||
| Ringer Profiles | Yes | - | Yes |
| Connectivity | |||
| Bluetooth | Yes | Yes | Yes |
| NFC | - | Yes | - |
| USB |
Yes Micro-USB |
Yes Micro-USB |
Yes |
| Wi-Fi |
Yes 802.11 b,g |
Yes 4 (802.11 a,b,g,n) |
- |
| Input | |||
| Side Keys | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | - | Yes |
| Touch Screen | - |
Yes Capacitive |
- |
| Memory | |||
| Memory Card Slot | Yes * | Yes | Yes |
| Music | |||
| FM Radio | Yes | - | - |
| Headphone Jack (3.5mm) | Yes | Yes | - |
| Stereo Speakers | Yes | - | - |
| Photo & Video | |||
| DLNA | - | Yes | - |
| TV Output | - | Yes | - |
| Voice | |||
| Push-To-Talk | Yes * | - | - |
| Speaker Phone | Yes | Yes | Yes |
| * Some versions only | |||
| Nokia N81 | Samsung Galaxy S II / SGH-i777 | Pantech Matrix Pro C820 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Nokia N81 | Samsung Galaxy S II / SGH-i777 | Pantech Matrix Pro C820 |
