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| Phone | Casio G'zOne Rock | Siemens A56 / A56i | Samsung Galaxy Ring / Prevail 2 | Samsung SCH-A990 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
2.1" diag. 4 : 3 |
? |
4" diag. 5 : 3 |
? |
| Display Resolution & Type |
240 x 320 pixels (~190 ppi) LCD (TFT/TFD) |
101 x 64 pixels |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
240 x 320 pixels LCD (TFT/TFD) |
| Display Refresh | ? | ? | 60 Hz | ? |
| Battery | 1,150 mAh | 700 mAh | 1,750 mAh | 1,000 mAh |
| Processor | ? | ? | 1.4 GHz Qualcomm Snapdragon S2 MSM8655 | ? |
| RAM | ? | ? | 1 GB | ? |
| Storage | ? raw hardware | ? raw hardware | 4 GB | ? raw hardware |
| Main Camera | 2 megapixel | - | 5 megapixel | 3 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | ? | - | 720p HD | ? |
| Front Camera | - | - | 1 megapixel | - |
| Weight |
4.4 oz (125g) |
3 oz (85g) |
3.4 oz (96g) |
4.4 oz (125g) |
| Dimensions |
4.1" x 2" x 0.9" (104 x 51 x 22.9 mm) |
4" x 1.7" x 0.8" (102 x 43 x 20.3 mm) |
4.83" x 2.48" x 0.47" (123 x 63 x 11.9 mm) |
3.8" x 1.88" x 0.82" (97 x 48 x 20.8 mm) |
| Form Factor | Clamshell | Slab | Slab | Clamshell |
| Platform / OS | (proprietary) | (proprietary) | Android | (proprietary) |
| Network Bands |
CDMA: 850, 1900 |
GSM: 850, 1900 |
CDMA: 800, 850, 1900 |
CDMA: 850, 1900 |
| Data Technology | EVDO rA | - | EVDO rA | EVDO r0 |
| Features | ||||
| Flashlight | Yes | - | - | Yes |
| GPS / Location | Yes | Yes | n/a | Yes |
| Ruggedized | Yes | - | - | - |
| Water-Resistant | Yes | - | - | - |
| Accessibility | ||||
| Adjustable Text Size | - | - | n/a | - |
| Hearing Aid Compatible |
Yes M4, T4 (very tele-coil compatible) |
- |
Yes M4 (very compatible) |
Yes M3 (mostly compatible) |
| Multiple Languages | Yes | - | n/a | Yes |
| TTY/TDD (Digital) | Yes | Yes | Yes | Yes |
| Alerts | ||||
| Extra Display | Yes | - | - | Yes |
| Ringer Profiles | - | Yes | - | - |
| Connectivity | ||||
| Bluetooth | Yes | - | Yes | Yes |
| USB | Yes | - | Yes | Yes |
| Wi-Fi | - | - |
Yes 4 (802.11 a,b,g,n) |
- |
| Contacts | ||||
| Picture ID | Yes | Yes | n/a | Yes |
| Ringer ID | Yes | Yes | n/a | Yes |
| Voice Dialing | Yes | - | n/a | Yes |
| Customization | ||||
| Changeable Body Plates | - | Yes | - | - |
| Custom Graphics | Yes | Yes | n/a | Yes |
| Custom Ringtones | Yes | Yes | n/a | Yes |
| Real-Music Ringers | Yes | - | n/a | Yes |
| Data & Network | ||||
| Data Tethering | Yes | - | n/a | Yes |
| WAP / Web Browser | Yes | Yes | n/a | Yes |
| Input | ||||
| Predictive Text Entry | Yes | Yes | n/a | Yes |
| Side Keys | Yes | - | Yes | Yes |
| Touch Screen | - | - |
Yes Capacitive |
- |
| Memory | ||||
| Memory Card Slot | Yes | - | Yes | Yes |
| Messaging | ||||
| Email Client | Yes | - | n/a | - |
| EMS / Picture Messaging | - | Yes | n/a | Yes |
| Instant Messaging | Yes | - | n/a | - |
| MMS | Yes | - | n/a | Yes |
| Text Messaging Templates | Yes | - | n/a | Yes |
| Music | ||||
| Headphone Jack (3.5mm) | - | - | Yes | - |
| Music Player | Yes | - | n/a | Yes |
| Stereo Speakers | - | - | - | Yes |
| Photo & Video | ||||
| DLNA | - | - | Yes | - |
| TV Output | - | - | - | Yes |
| Productivity | ||||
| Alarm | Yes | Yes | n/a | Yes |
| Calculator | Yes | Yes | n/a | Yes |
| Calendar | Yes | - | n/a | Yes |
| Voice Memo | Yes | - | n/a | Yes |
| Software | ||||
| BREW | Yes | - | n/a | Yes |
| Games | Yes | Yes | n/a | Yes |
| Voice | ||||
| Headset Jack (2.5 mm) | Yes | - | n/a | - |
| Push-To-Talk | Yes | - | - | - |
| Speaker Phone | Yes | - | Yes | Yes |
| Casio G'zOne Rock | Siemens A56 / A56i | Samsung Galaxy Ring / Prevail 2 | Samsung SCH-A990 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Casio G'zOne Rock | Siemens A56 / A56i | Samsung Galaxy Ring / Prevail 2 | Samsung SCH-A990 |
