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| Phone | Casio G'zOne Boulder | Red Hydrogen One | Motorola Krave ZN4 | HTC Droid Eris |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
2" diag. 4 : 3 |
5.7" diag. 16 : 9 |
2.8" diag. 5 : 3 |
3.2" diag. 5 : 3 |
| Display Resolution & Type |
240 x 320 pixels (~200 ppi) LCD (TFT/TFD) |
1440 x 2560 pixels (~515 ppi) LCD (TFT/TFD) |
240 x 400 pixels (~167 ppi) LCD (TFT/TFD) |
320 x 480 pixels (~180 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | ? | 60 Hz |
| Battery | 810 mAh | 4,510 mAh | 950 mAh | 1,300 mAh |
| Processor | ? | 2.5 GHz Qualcomm Snapdragon 835 (MSM8998) | ? | 528 MHz MSM7600 |
| RAM | ? | 6 GB | ? | ? |
| Storage | ? raw hardware | 128 GB * | ? raw hardware | ? raw hardware |
| Main Camera | 1 megapixel | 12 megapixel | 2 megapixel | 5 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | ? | 4K UHD | QVGA (320 x 240) | CIF (352 x 288) |
| Front Camera | - | 8 megapixel | - | - |
| Weight |
4.9 oz (139g) |
9.63 oz (273g) |
4.52 oz (128g) |
4.43 oz (126g) |
| Dimensions |
3.9" x 2" x 0.9" (99 x 51 x 22.9 mm) |
6.54" x 3.28" x 0.39" (166 x 83 x 10 mm) |
4.12" x 2.01" x 0.74" (105 x 51 x 18.8 mm) |
4.45" x 2.19" x 0.52" (113 x 55 x 13.2 mm) |
| Form Factor | Clamshell | Slab | Flip | Slab |
| Platform / OS | (proprietary) | Android | (proprietary) | Android |
| Network Bands |
CDMA: 850, 1900 |
4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 66 WCDMA: 1, 2, 4, 5, 8, 19 CDMA: 800, 850, 1900 GSM: 850, 900, 1800, 1900 |
CDMA: 850, 1900 |
CDMA: 850, 1900 |
| Data Technology | EVDO rA | LTE (Cat 12) | EVDO r0 | EVDO rA |
| Features | ||||
| Fingerprint Reader | - |
Yes stand-alone |
- | - |
| Flashlight | Yes | Yes | - | - |
| GPS / Location | Yes | n/a | Yes | n/a |
| Ruggedized | Yes | - | - | - |
| Water-Resistant | Yes | - | - | - |
| Accessibility | ||||
| Hearing Aid Compatible | Yes | Yes | Yes | Yes |
| Multiple Languages | Yes | n/a | Yes | n/a |
| TTY/TDD (Digital) | Yes | Yes | Yes | Yes |
| Alerts | ||||
| Extra Display | Yes | - | - | - |
| Connectivity | ||||
| Bluetooth | Yes | Yes | Yes | Yes |
| NFC | - | Yes | - | - |
| USB | Yes |
Yes USB Type C |
Yes Micro-USB |
Yes Mini-USB |
| Wi-Fi | - |
Yes 5 (802.11 a,ac,b,g,n) |
- |
Yes 802.11 b,g |
| Contacts | ||||
| Picture ID | Yes | n/a | Yes | n/a |
| Ringer ID | Yes | n/a | Yes | n/a |
| Voice Dialing | Yes | n/a | Yes | n/a |
| Customization | ||||
| Changeable Body Plates | Yes | - | - | - |
| Custom Graphics | Yes | n/a | Yes | n/a |
| Custom Ringtones | Yes | n/a | Yes | n/a |
| Real-Music Ringers | - | n/a | Yes | n/a |
| Data & Network | ||||
| Data Tethering | Yes | n/a | Yes | n/a |
| WAP / Web Browser | Yes | n/a | Yes | n/a |
| Input | ||||
| Predictive Text Entry | Yes | n/a | Yes | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen | - | Yes | Yes | Yes |
| Memory | ||||
| Memory Card Slot | Yes | Yes | Yes | Yes |
| Messaging | ||||
| Email Client | - | n/a | Yes | n/a |
| EMS / Picture Messaging | Yes | n/a | Yes | n/a |
| Instant Messaging | - | n/a | Yes | n/a |
| MMS | Yes | n/a | Yes | n/a |
| Text Messaging Templates | Yes | n/a | Yes | n/a |
| Music | ||||
| FM Radio | - | Yes | - | - |
| Headphone Jack (3.5mm) | - | Yes | Yes | Yes |
| Music Player | Yes | n/a | Yes | n/a |
| Stereo Speakers | - | Yes | - | - |
| Power | ||||
| Fast Charging | - | Yes | - | - |
| Productivity | ||||
| Alarm | Yes | n/a | Yes | n/a |
| Calculator | Yes | n/a | Yes | n/a |
| Calendar | Yes | n/a | Yes | n/a |
| Voice Memo | Yes | n/a | Yes | n/a |
| Software | ||||
| BREW | Yes | n/a | Yes | n/a |
| Games | Yes | n/a | Yes | n/a |
| Voice | ||||
| HD Voice | - | Yes | - | - |
| Push-To-Talk | Yes | - | - | - |
| Speaker Phone | Yes | Yes | Yes | Yes |
| Casio G'zOne Boulder | Red Hydrogen One | Motorola Krave ZN4 | HTC Droid Eris | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Casio G'zOne Boulder | Red Hydrogen One | Motorola Krave ZN4 | HTC Droid Eris |
