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| Phone | Nuu F4L | Coolpad Quattro 4G | Samsung M520 | Kyocera DuraForce | Samsung SGH-X640 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) | (none) |
| Global Availability | Not yet released | Released | Released | Released | Released |
| Specifications | |||||
|---|---|---|---|---|---|
| Display Size |
2.8" diag. 4 : 3 |
4" diag. 5 : 3 |
2.1" diag. 4 : 3 |
4.5" diag. 16 : 9 |
? |
| Display Resolution & Type |
240 x 320 pixels (~143 ppi) LCD (STN) |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
176 x 220 pixels (~134 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~326 ppi) LCD (TFT/TFD) |
128 x 160 pixels LCD (TFT/TFD) |
| Display Refresh | 60 Hz | 60 Hz | ? | 60 Hz | ? |
| Battery | 1,350 mAh | 1,600 mAh | ? | 3,100 mAh | 800 mAh |
| Processor | 1.1 GHz MediaTek MT6731 | ? | ? | 1.4 GHz Qualcomm Snapdragon 400 (MSM8928) | ? |
| RAM | 512 MB | ? | ? | 2 GB | ? |
| Storage | 4 GB | 512 MB | ? raw hardware | 16 GB | ? raw hardware |
| Main Camera | 2 megapixel | 3 megapixel | 1 megapixel | 8 megapixel | Yes |
| Wide Camera | - | - | - | - | - |
| Tele Camera | - | - | - | - | - |
| Video Capture | 720p HD | VGA (640 x 480) | ? | 1080p HD | - |
| Front Camera | Yes | Yes | - | 2 megapixel | - |
| Weight |
4.5 oz (128g) |
3.31 oz (94g) |
2.75 oz (78g) |
7.06 oz (200g) |
3 oz (85g) |
| Dimensions |
4.31" x 2.27" x 0.83" (109 x 58 x 21 mm) |
4.96" x 2.6" x 0.51" (126 x 66 x 13 mm) |
4.01" x 2.04" x 0.5" (102 x 52 x 12.7 mm) |
5.39" x 2.78" x 0.55" (137 x 71 x 14 mm) |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
| Form Factor | Clamshell | Slab | Slide | Slab | Clamshell |
| Platform / OS | (proprietary) | Android | (proprietary) | Android | (proprietary) |
| Network Bands |
4G LTE: 2, 4, 5, 12, 13, 66 WCDMA: 2, 4, 5 GSM: 850, 1900 |
4G LTE: 2, 4 CDMA: 850, 1700, 1900 |
CDMA: 850, 1900 |
GSM: 900, 1800, 1900 |
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| Data Technology | LTE (Cat 4) | LTE (Cat 3) | EVDO r0 | LTE (Cat 3) | GPRS |
| Features | |||||
| Flashlight | Yes | - | - | Yes | - |
| GPS / Location | Yes | n/a | Yes | n/a | - |
| Ruggedized | - | - | - | Yes | - |
| Water-Resistant | - | - | - |
Yes IPX8 (SCUBA) |
- |
| Accessibility | |||||
| Adjustable Text Size | Yes | n/a | - | n/a | - |
| Hearing Aid Compatible |
Yes M4, T4 (very tele-coil compatible) |
Yes M4, T3 (mostly tele-coil compatible) |
Yes M4 (very compatible) |
Yes M4, T3 (mostly tele-coil compatible) |
- |
| Multiple Languages | Yes | n/a | Yes | n/a | Yes |
| 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 Micro-USB |
Yes | Yes |
Yes Micro-USB |
- |
| Wi-Fi |
Yes 4 (802.11 b,g,n) |
Yes | - |
Yes 5 (802.11 a,ac,b,g,n) |
- |
| Contacts | |||||
| Picture ID | Yes | n/a | Yes | n/a | Yes |
| Ringer ID | Yes | n/a | Yes | n/a | Yes |
| Voice Dialing | - | n/a | Yes | n/a | - |
| Customization | |||||
| Custom Graphics | Yes | n/a | Yes | n/a | Yes |
| Custom Ringtones | - | n/a | Yes | n/a | Yes |
| Real-Music Ringers | - | n/a | - | n/a | - |
| Data & Network | |||||
| Data Tethering | - | n/a | Yes | n/a | - |
| WAP / Web Browser | Yes | n/a | Yes | n/a | Yes |
| Input | |||||
| Predictive Text Entry | Yes | n/a | Yes | n/a | Yes |
| Side Keys | Yes | Yes | Yes | Yes | Yes |
| Touch Screen | - |
Yes Capacitive |
- |
Yes Capacitive |
- |
| Memory | |||||
| Memory Card Slot | Yes | Yes | Yes | Yes | - |
| Messaging | |||||
| Email Client | Yes | n/a | - | n/a | - |
| EMS / Picture Messaging | - | n/a | - | n/a | Yes |
| Instant Messaging | Yes | n/a | - | n/a | - |
| MMS | Yes | n/a | - | n/a | Yes |
| Text Messaging Templates | Yes | n/a | Yes | n/a | Yes |
| Music | |||||
| FM Radio | Yes | - | - | - | - |
| Headphone Jack (3.5mm) | Yes | Yes | - | Yes | - |
| Music Player | Yes | n/a | Yes | n/a | - |
| Stereo Speakers | - | - | - | Yes | - |
| Photo & Video | |||||
| DLNA | - | - | - | Yes | - |
| Miracast | - | - | - | Yes | - |
| Power | |||||
| Wireless Charging | - | - | - | Yes | - |
| Productivity | |||||
| Alarm | Yes | n/a | Yes | n/a | Yes |
| Calculator | Yes | n/a | Yes | n/a | Yes |
| Calendar | Yes | n/a | Yes | n/a | Yes |
| To-Do List | - | n/a | Yes | n/a | Yes |
| Voice Memo | Yes | n/a | Yes | n/a | Yes |
| Software | |||||
| Games | - | n/a | Yes | n/a | Yes |
| Java (J2ME) | - | n/a | Yes | n/a | Yes |
| Voice | |||||
| HD Voice | Yes | - | - | - | - |
| Headset Jack (2.5 mm) | - | n/a | - | n/a | Yes |
| Push-To-Talk | - | - | - | Yes * | - |
| Speaker Phone | Yes | Yes | Yes | Yes | Yes |
| * Some versions only | |||||
| Nuu F4L | Coolpad Quattro 4G | Samsung M520 | Kyocera DuraForce | Samsung SGH-X640 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Nuu F4L | Coolpad Quattro 4G | Samsung M520 | Kyocera DuraForce | Samsung SGH-X640 |
