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| Phone | Samsung SGH-X640 | Samsung SGH-T819 | Motorola Rival A455 | Samsung SPH-A520 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? | ? |
2.2" diag. 4 : 3 |
? |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
176 x 220 pixels LCD (TFT/TFD) |
176 x 220 pixels (~131 ppi) LCD (TFT/TFD) |
? LCD (STN) |
| Display Refresh | ? | ? | ? | ? |
| Battery | 800 mAh | ? | 940 mAh | ? |
| Processor | ? | ? | ? | ? |
| RAM | ? | ? | ? | ? |
| Storage | ? raw hardware | ? raw hardware | ? raw hardware | ? raw hardware |
| Main Camera | Yes | 1 megapixel | 2 megapixel | - |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | QCIF (176 x 144) | QVGA (320 x 240) | - |
| Front Camera | - | - | - | - |
| Weight |
3 oz (85g) |
3.46 oz (98g) |
4.48 oz (127g) |
3.6 oz (102g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
3.96" x 2.03" x 0.55" (101 x 52 x 14 mm) |
3.82" x 1.96" x 0.73" (97 x 50 x 18.5 mm) |
3.46" x 1.83" x 0.91" (88 x 46 x 23.1 mm) |
| Form Factor | Clamshell | Slide | Slide | Clamshell |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) | (proprietary) |
| Network Bands |
GSM: 900, 1800, 1900 |
WCDMA: 4 GSM: 850, 900, 1800, 1900 |
CDMA: 850, 1900 |
CDMA: 850, 1900 AMPS: 850 |
| Data Technology | GPRS | WCDMA (UMTS) | EVDO r0 | 1xRTT |
| Features | ||||
| GPS / Location | - | - | Yes | Yes |
| Accessibility | ||||
| Hearing Aid Compatible | - | - |
Yes M3, T3 (mostly tele-coil compatible) |
- |
| Multiple Languages | Yes | Yes | Yes | Yes |
| TTY/TDD (Digital) | - | - | Yes | - |
| Alerts | ||||
| Extra Display | - | - | - | Yes |
| Ringer Profiles | - | Yes | - | - |
| Connectivity | ||||
| Bluetooth | - | Yes | Yes | - |
| USB | - | Yes |
Yes Micro-USB |
- |
| Contacts | ||||
| Picture ID | Yes | Yes | Yes | Yes |
| Ringer ID | Yes | Yes | Yes | Yes |
| Voice Dialing | - | Yes | Yes | Yes |
| Customization | ||||
| Custom Graphics | Yes | Yes | Yes | Yes |
| Custom Ringtones | Yes | Yes | Yes | Yes |
| Real-Music Ringers | - | Yes | Yes | - |
| Data & Network | ||||
| Data Tethering | - | Yes | Yes | Yes |
| WAP / Web Browser | Yes | Yes | Yes | Yes |
| Input | ||||
| Predictive Text Entry | Yes | Yes | - | Yes |
| Side Keys | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | - | Yes | - |
| Touch Screen | - | - | Yes | - |
| Memory | ||||
| Memory Card Slot | - | Yes | Yes | - |
| Messaging | ||||
| Email Client | - | - | Yes | - |
| EMS / Picture Messaging | Yes | Yes | Yes | - |
| Instant Messaging | - | Yes | Yes | - |
| MMS | Yes | Yes | Yes | - |
| Text Messaging Templates | Yes | Yes | Yes | - |
| Music | ||||
| Headphone Jack (3.5mm) | - | - | Yes | - |
| Music Player | - | Yes | Yes | - |
| Productivity | ||||
| Alarm | Yes | Yes | Yes | Yes |
| Calculator | Yes | Yes | Yes | Yes |
| Calendar | Yes | Yes | Yes | Yes |
| To-Do List | Yes | Yes | - | Yes |
| Voice Memo | Yes | - | Yes | Yes |
| Software | ||||
| BREW | - | - | Yes | - |
| Games | Yes | Yes | Yes | Yes |
| Java (J2ME) | Yes | Yes | - | - |
| Voice | ||||
| Headset Jack (2.5 mm) | Yes | - | - | Yes |
| Speaker Phone | Yes | Yes | Yes | - |
| Samsung SGH-X640 | Samsung SGH-T819 | Motorola Rival A455 | Samsung SPH-A520 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | Samsung SGH-T819 | Motorola Rival A455 | Samsung SPH-A520 |
