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| Phone | Nokia N81 | Sony Ericsson K850 | Kyocera DuraXV Extreme / Extreme+ | Samsung Freeform 4 / Comment 2 |
| Current U.S. Carriers | (none) | (none) | Verizon | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
2.4" diag. 4 : 3 |
2.2" diag. 4 : 3 |
2.6" diag. 4 : 3 |
2.4" diag. 4 : 3 |
| Display Resolution & Type |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~182 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~154 ppi) LCD (TFT/TFD) |
320 x 240 pixels (~167 ppi) LCD (Color) |
| Display Refresh | ? | ? | ? | ? |
| Battery | 1,050 mAh | ? | 1,770 mAh | 1,000 mAh |
| Processor | 369 MHz ARM 11 | ? | 2 GHz MediaTek Helio A22 (6761) | ? |
| RAM | ? | ? | 2 GB | ? |
| Storage | 8 GB * | ? raw hardware | 16 GB | ? raw hardware |
| Main Camera | 2 megapixel | 5 megapixel | 5 megapixel | 2 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | VGA (640 x 480) | ? | 720p HD | QCIF (176 x 144) |
| Front Camera | - | - | - | - |
| Weight |
4.94 oz (140g) |
4.2 oz (119g) |
6.8 oz (193g) |
3.35 oz (95g) |
| Dimensions |
4.02" x 1.97" x 0.7" (102 x 50 x 17.8 mm) |
4" x 1.9" x 0.7" (102 x 48 x 17.8 mm) |
4.36" x 2.22" x 1.07" (111 x 56 x 27.2 mm) |
4.38" x 2.38" x 0.42" (111 x 60 x 10.7 mm) |
| Form Factor | Slide | Slab | Clamshell | Slab |
| Platform / OS | S60 (Symbian) | (proprietary) | (proprietary) | (proprietary) |
| Network Bands |
WCDMA: 1 GSM: 850, 900, 1800, 1900 |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
4G LTE: 2, 4, 5, 12, 13 WCDMA: 1, 2, 5 |
CDMA: 850, 1700, 1900 |
| Data Technology | EDGE | HSDPA 3.6 | LTE (Cat 4) | 1xRTT |
| Features | ||||
| Barometer | - | - | Yes * | - |
| Flashlight | - | - | Yes | - |
| GPS / Location | n/a | - | Yes | Yes |
| Ruggedized | - | - | Yes | - |
| Water-Resistant | - | - |
Yes IPX8 (SCUBA) |
- |
| Accessibility | ||||
| Adjustable Text Size | n/a | - | Yes | Yes |
| Hearing Aid Compatible | - | - |
Yes M4, T4 (very tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | n/a | Yes | Yes | Yes |
| TTY/TDD (Digital) | - | Yes | Yes | Yes |
| Alerts | ||||
| Extra Display | - | - | Yes | - |
| Ringer Profiles | Yes | Yes | - | - |
| Connectivity | ||||
| Bluetooth | Yes | Yes | Yes | Yes |
| Mobile Hotspot | n/a | - | Yes | - |
| USB |
Yes Micro-USB |
Yes |
Yes USB Type C |
Yes Micro-USB |
| Wi-Fi |
Yes 802.11 b,g |
- |
Yes 5 (802.11 a,ac,b,g,n) |
- |
| Contacts | ||||
| Picture ID | n/a | Yes | Yes | Yes |
| Ringer ID | n/a | Yes | Yes | Yes |
| Voice Dialing | n/a | Yes | Yes | Yes |
| Customization | ||||
| Custom Graphics | n/a | Yes | Yes | Yes |
| Custom Ringtones | n/a | Yes | Yes | Yes |
| Real-Music Ringers | n/a | Yes | Yes | Yes |
| Data & Network | ||||
| Data Tethering | n/a | Yes | Yes | - |
| WAP / Web Browser | n/a | Yes | Yes | Yes |
| Input | ||||
| Predictive Text Entry | n/a | Yes | Yes | Yes |
| Side Keys | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | - | - | Yes |
| Memory | ||||
| Memory Card Slot | Yes * | Yes | Yes | Yes |
| Messaging | ||||
| Email Client | n/a | Yes | Yes | - |
| Instant Messaging | n/a | - | - | - |
| MMS | n/a | Yes | Yes | Yes |
| Text Messaging Templates | n/a | Yes | Yes | Yes |
| Music | ||||
| FM Radio | Yes | Yes | Yes | - |
| Headphone Jack (3.5mm) | Yes | - | Yes | Yes |
| Music Player | n/a | Yes | Yes | Yes |
| Stereo Speakers | Yes | - | - | - |
| Photo & Video | ||||
| Video Calling | n/a | Yes * | - | - |
| Productivity | ||||
| Alarm | n/a | Yes | Yes | Yes |
| Calculator | n/a | Yes | Yes | Yes |
| Calendar | n/a | Yes | Yes | Yes |
| To-Do List | n/a | Yes | - | - |
| Voice Memo | n/a | Yes | Yes | Yes |
| Software | ||||
| BREW | n/a | - | - | Yes |
| Games | n/a | Yes | - | Yes |
| Java (J2ME) | n/a | Yes | - | - |
| Voice | ||||
| HD Voice | - | - | Yes | - |
| Push-To-Talk | Yes * | - | Yes | - |
| Speaker Phone | Yes | Yes | Yes | Yes |
| * Some versions only | ||||
| Nokia N81 | Sony Ericsson K850 | Kyocera DuraXV Extreme / Extreme+ | Samsung Freeform 4 / Comment 2 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Nokia N81 | Sony Ericsson K850 | Kyocera DuraXV Extreme / Extreme+ | Samsung Freeform 4 / Comment 2 |
