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| Phone | Samsung SGH-D307 | Samsung SGH-A657 | Nokia Lumia 521 / 520 | Kyocera DuraForce |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? | ? |
4" diag. 5 : 3 |
4.5" diag. 16 : 9 |
| Display Resolution & Type |
176 x 220 pixels LCD (TFT/TFD) |
176 x 220 pixels LCD (TFT/TFD) |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~326 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? | 60 Hz |
| Battery | ? | 1,420 mAh | 1,430 mAh | 3,100 mAh |
| Processor | ? | ? | 1 GHz Qualcomm Snapdragon S4 MSM8270 | 1.4 GHz Qualcomm Snapdragon 400 (MSM8928) |
| RAM | ? | ? | 512 MB | 2 GB |
| Storage | ? raw hardware | ? raw hardware | 8 GB | 16 GB |
| Main Camera | - | - | 5 megapixel | 8 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | - | 720p HD | 1080p HD |
| Front Camera | - | - | - | 2 megapixel |
| Weight |
4.3 oz (122g) |
4.34 oz (123g) |
4.39 oz (124g) |
7.06 oz (200g) |
| Dimensions |
3.7" x 1.9" x 0.85" (94 x 48 x 21.6 mm) |
4.53" x 2.05" x 0.77" (115 x 52 x 19.6 mm) |
4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm) |
5.39" x 2.78" x 0.55" (137 x 71 x 14 mm) |
| Form Factor | Clamshell | Slab | Slab | Slab |
| Platform / OS | (proprietary) | (proprietary) | Windows | Android |
| Network Bands |
GSM: 850, 1800, 1900 |
WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 |
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| Data Technology | EDGE | HSDPA 3.6 | HSPA+ 21 | LTE (Cat 3) |
| Features | ||||
| Flashlight | - | Yes | - | Yes |
| GPS / Location | - | Yes | n/a | n/a |
| Ruggedized | - | Yes | - | Yes |
| Water-Resistant | - | - | - |
Yes IPX8 (SCUBA) |
| Accessibility | ||||
| Adjustable Text Size | - | - | n/a | n/a |
| Hearing Aid Compatible | Yes | - | Yes | Yes |
| Multiple Languages | Yes | Yes | n/a | n/a |
| TTY/TDD (Digital) | Yes | Yes | Yes | Yes |
| Alerts | ||||
| Extra Display | Yes | - | - | - |
| Connectivity | ||||
| Bluetooth | Yes | Yes | Yes | Yes |
| Mobile Hotspot | - | - | n/a | n/a |
| NFC | - | - | - | Yes |
| USB | Yes | Yes | Yes |
Yes Micro-USB |
| Wi-Fi | - | - | Yes |
Yes 5 (802.11 a,ac,b,g,n) |
| Contacts | ||||
| Picture ID | Yes | Yes | n/a | n/a |
| Ringer ID | Yes | Yes | n/a | n/a |
| Voice Dialing | Yes | - | n/a | n/a |
| Customization | ||||
| Custom Graphics | Yes | Yes | n/a | n/a |
| Custom Ringtones | Yes | Yes | n/a | n/a |
| Real-Music Ringers | Yes | Yes | n/a | n/a |
| Data & Network | ||||
| Data Tethering | Yes | Yes | n/a | n/a |
| WAP / Web Browser | Yes | Yes | n/a | n/a |
| Input | ||||
| Predictive Text Entry | Yes | Yes | n/a | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | Yes | - | - | - |
| Touch Screen | - | - | Yes | Yes |
| Memory | ||||
| Memory Card Slot | - | Yes | Yes | Yes |
| Messaging | ||||
| Email Client | Yes | Yes | n/a | n/a |
| EMS / Picture Messaging | Yes | - | n/a | n/a |
| Instant Messaging | - | Yes | n/a | n/a |
| MMS | Yes | Yes | n/a | n/a |
| Text Messaging Templates | Yes | Yes | n/a | n/a |
| Music | ||||
| Headphone Jack (3.5mm) | - | - | Yes | Yes |
| Music Player | - | Yes | n/a | n/a |
| Stereo Speakers | - | - | - | Yes |
| Photo & Video | ||||
| DLNA | - | - | - | Yes |
| Miracast | - | - | - | Yes |
| Power | ||||
| Wireless Charging | - | - | - | Yes |
| Productivity | ||||
| Alarm | Yes | Yes | n/a | n/a |
| Calculator | Yes | Yes | n/a | n/a |
| Calendar | Yes | Yes | n/a | n/a |
| To-Do List | Yes | Yes | n/a | n/a |
| Voice Memo | Yes | Yes | n/a | n/a |
| Software | ||||
| Games | Yes | Yes | n/a | n/a |
| Java (J2ME) | Yes | Yes | n/a | n/a |
| Voice | ||||
| Push-To-Talk | - | Yes | - | Yes * |
| Speaker Phone | Yes | Yes | Yes | Yes |
| * Some versions only | ||||
| Samsung SGH-D307 | Samsung SGH-A657 | Nokia Lumia 521 / 520 | Kyocera DuraForce | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-D307 | Samsung SGH-A657 | Nokia Lumia 521 / 520 | Kyocera DuraForce |
