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| Phone | Samsung SGH-X640 | Samsung SCH-A990 | Casio G'zOne Boulder |
| Current U.S. Carriers | (none) | (none) | (none) |
| Global Availability | Released | Released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size | ? | ? |
2" diag. 4 : 3 |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
240 x 320 pixels LCD (TFT/TFD) |
240 x 320 pixels (~200 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? |
| Battery | 800 mAh | 1,000 mAh | 810 mAh |
| Processor | ? | ? | ? |
| RAM | ? | ? | ? |
| Storage | ? raw hardware | ? raw hardware | ? raw hardware |
| Main Camera | Yes | 3 megapixel | 1 megapixel |
| Wide Camera | - | - | - |
| Tele Camera | - | - | - |
| Video Capture | - | ? | ? |
| Front Camera | - | - | - |
| Weight |
3 oz (85g) |
4.4 oz (125g) |
4.9 oz (139g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
3.8" x 1.88" x 0.82" (97 x 48 x 20.8 mm) |
3.9" x 2" x 0.9" (99 x 51 x 22.9 mm) |
| Form Factor | Clamshell | Clamshell | Clamshell |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) |
| Network Bands |
GSM: 900, 1800, 1900 |
CDMA: 850, 1900 |
CDMA: 850, 1900 |
| Data Technology | GPRS | EVDO r0 | EVDO rA |
| Features | |||
| Flashlight | - | Yes | Yes |
| GPS / Location | - | Yes | Yes |
| Ruggedized | - | - | Yes |
| Water-Resistant | - | - | Yes |
| Accessibility | |||
| Hearing Aid Compatible | - |
Yes M3 (mostly compatible) |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | Yes | Yes | Yes |
| TTY/TDD (Digital) | - | Yes | Yes |
| Alerts | |||
| Extra Display | - | Yes | Yes |
| Connectivity | |||
| Bluetooth | - | Yes | Yes |
| USB | - | Yes | Yes |
| Contacts | |||
| Picture ID | Yes | Yes | Yes |
| Ringer ID | Yes | Yes | Yes |
| Voice Dialing | - | Yes | Yes |
| Customization | |||
| Changeable Body Plates | - | - | Yes |
| Custom Graphics | Yes | Yes | Yes |
| Custom Ringtones | Yes | Yes | Yes |
| Real-Music Ringers | - | Yes | - |
| Data & Network | |||
| Data Tethering | - | Yes | Yes |
| WAP / Web Browser | Yes | Yes | Yes |
| Input | |||
| Predictive Text Entry | Yes | Yes | Yes |
| Side Keys | Yes | Yes | Yes |
| Memory | |||
| Memory Card Slot | - | Yes | Yes |
| Messaging | |||
| EMS / Picture Messaging | Yes | Yes | Yes |
| MMS | Yes | Yes | Yes |
| Text Messaging Templates | Yes | Yes | Yes |
| Music | |||
| Music Player | - | Yes | Yes |
| Stereo Speakers | - | Yes | - |
| Photo & Video | |||
| TV Output | - | Yes | - |
| Productivity | |||
| Alarm | Yes | Yes | Yes |
| Calculator | Yes | Yes | Yes |
| Calendar | Yes | Yes | Yes |
| To-Do List | Yes | - | - |
| Voice Memo | Yes | Yes | Yes |
| Software | |||
| BREW | - | Yes | Yes |
| Games | Yes | Yes | Yes |
| Java (J2ME) | Yes | - | - |
| Voice | |||
| Headset Jack (2.5 mm) | Yes | - | - |
| Push-To-Talk | - | - | Yes |
| Speaker Phone | Yes | Yes | Yes |
| Samsung SGH-X640 | Samsung SCH-A990 | Casio G'zOne Boulder | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | Samsung SCH-A990 | Casio G'zOne Boulder |
