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| Phone | Samsung SCH-A645 | Samsung SGH-P850 / P858 | ZTE Engage LT / Engage MT | Casio G'zOne Boulder |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? | ? |
4" diag. 5 : 3 |
2" diag. 4 : 3 |
| Display Resolution & Type |
128 x 160 pixels LCD (STN) |
240 x 320 pixels LCD (TFT/TFD) |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~200 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | 60 Hz | ? |
| Battery | 1,000 mAh | 950 mAh | 1,900 mAh | 810 mAh |
| Processor | ? | ? | ? | ? |
| RAM | ? | ? | 1 GB | ? |
| Storage | ? raw hardware | ? raw hardware | 4 GB | ? raw hardware |
| Main Camera | - | 3 megapixel | 3 megapixel | 1 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | ? | WVGA / 480p | ? |
| Front Camera | - | - | Yes | - |
| Weight |
3.2 oz (91g) |
4.23 oz (120g) |
5.09 oz (144g) |
4.9 oz (139g) |
| Dimensions |
3.54" x 1.79" x 0.94" (90 x 45 x 23.9 mm) |
3.77" x 1.86" x 0.96" (96 x 47 x 24.4 mm) |
4.78" x 2.54" x 0.46" (121 x 64 x 11.7 mm) |
3.9" x 2" x 0.9" (99 x 51 x 22.9 mm) |
| Form Factor | Clamshell | Clamshell | Slab | Clamshell |
| Platform / OS | (proprietary) | (proprietary) | Android | (proprietary) |
| Network Bands |
CDMA: 850, 1900 AMPS: 850 |
GSM: 900, 1800, 1900 |
CDMA: 850, 1700, 1900 |
CDMA: 850, 1900 |
| Data Technology | 1xRTT | EDGE | EVDO rA | EVDO rA |
| Features | ||||
| Flashlight | - | - | - | Yes |
| GPS / Location | Yes | - | n/a | Yes |
| Ruggedized | - | - | - | Yes |
| Water-Resistant | - | - | - | Yes |
| Accessibility | ||||
| Adjustable Text Size | - | - | n/a | - |
| Hearing Aid Compatible |
Yes M3 (mostly compatible) |
- | - |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | Yes | Yes | n/a | Yes |
| TTY/TDD (Digital) | Yes | - | Yes | Yes |
| Alerts | ||||
| Extra Display | Yes | Yes | - | Yes |
| Connectivity | ||||
| Bluetooth | - | Yes | Yes | Yes |
| USB | - | Yes |
Yes Micro-USB |
Yes |
| Wi-Fi | - | - | Yes | - |
| Contacts | ||||
| Picture ID | Yes | Yes | n/a | Yes |
| Ringer ID | - | 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 | - |
| Data & Network | ||||
| Data Tethering | - | - | 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 | 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 | - | - | n/a | - |
| MMS | - | Yes | n/a | Yes |
| Text Messaging Templates | Yes | Yes | n/a | Yes |
| Music | ||||
| Headphone Jack (3.5mm) | - | - | Yes | - |
| Music Player | - | Yes | n/a | Yes |
| Stereo Speakers | - | Yes | - | - |
| Photo & Video | ||||
| TV Output | - | Yes | - | - |
| Productivity | ||||
| Alarm | Yes | Yes | n/a | Yes |
| Calculator | Yes | Yes | n/a | Yes |
| Calendar | Yes | Yes | n/a | Yes |
| To-Do List | Yes | - | n/a | - |
| Voice Memo | Yes | Yes | n/a | Yes |
| Software | ||||
| BREW | Yes * | - | n/a | Yes |
| Games | Yes * | Yes | n/a | Yes |
| Java (J2ME) | - | Yes | n/a | - |
| Voice | ||||
| Headset Jack (2.5 mm) | Yes | - | n/a | - |
| Push-To-Talk | - | - | - | Yes |
| Speaker Phone | Yes | Yes | Yes | Yes |
| * Some versions only | ||||
| Samsung SCH-A645 | Samsung SGH-P850 / P858 | ZTE Engage LT / Engage MT | Casio G'zOne Boulder | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SCH-A645 | Samsung SGH-P850 / P858 | ZTE Engage LT / Engage MT | Casio G'zOne Boulder |
