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| Phone | Nokia N81 | Motorola Backflip | Samsung Nexus S 4G |
| 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" diag. 5 : 3 |
| Display Resolution & Type |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
320 x 480 pixels (~186 ppi) LCD (TFT/TFD) |
480 x 800 pixels (~233 ppi) AMOLED |
| Display Refresh | ? | 60 Hz | 60 Hz |
| Battery | 1,050 mAh | 1,400 mAh | 1,500 mAh |
| Processor | 369 MHz ARM 11 | 528 MHz Qualcomm MSM7201a | 1 GHz Samsung Hummingbird Cortex A8 |
| RAM | ? | ? | ? |
| Storage | 8 GB * | ? raw hardware | 16 GB |
| Main Camera | 2 megapixel | 5 megapixel | 5 megapixel |
| Wide Camera | - | - | - |
| Tele Camera | - | - | - |
| Video Capture | VGA (640 x 480) | CIF (352 x 288) | WVGA / 480p |
| Front Camera | - | - | Yes |
| Weight |
4.94 oz (140g) |
4.7 oz (133g) |
4.62 oz (131g) |
| Dimensions |
4.02" x 1.97" x 0.7" (102 x 50 x 17.8 mm) |
4.25" x 2.09" x 0.6" (108 x 53 x 15.3 mm) |
4.88" x 2.48" x 0.44" (124 x 63 x 11.2 mm) |
| Platform / OS | S60 (Symbian) | Android | Android |
| Network Bands |
WCDMA: 1 GSM: 850, 900, 1800, 1900 |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
4G WiMAX: 41 CDMA: 850, 1900 |
| Data Technology | EDGE | HSPA 7.2 | WiMAX |
| Features | |||
| Accessibility | |||
| Hearing Aid Compatible | - |
Yes M3 (mostly compatible) |
Yes M4 (very compatible) |
| Alerts | |||
| Ringer Profiles | Yes | - | - |
| Connectivity | |||
| Bluetooth | Yes | Yes | Yes |
| NFC | - | - | Yes |
| USB |
Yes Micro-USB |
Yes Micro-USB |
Yes Micro-USB |
| Wi-Fi |
Yes 802.11 b,g |
Yes 802.11 b,g |
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 | - |
| Music | |||
| FM Radio | Yes | - | - |
| Headphone Jack (3.5mm) | Yes | Yes | Yes |
| Stereo Speakers | Yes | - | - |
| Voice | |||
| Push-To-Talk | Yes * | - | - |
| Speaker Phone | Yes | Yes | Yes |
| * Some versions only | |||
| Nokia N81 | Motorola Backflip | Samsung Nexus S 4G | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Nokia N81 | Motorola Backflip | Samsung Nexus S 4G |
