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| Phone | Samsung SGH-X640 | Samsung SGH-A157 |
| Current U.S. Carriers | (none) | (none) |
| Global Availability | Released | Released |
| Specifications | ||
|---|---|---|
| Display Size | ? |
1.8" diag. 4 : 3 |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
128 x 160 pixels (~116 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? |
| Battery | 800 mAh | 800 mAh |
| Processor | ? | ? |
| RAM | ? | ? |
| Storage | ? raw hardware | 256 MB |
| Main Camera | Yes | - |
| Wide Camera | - | - |
| Tele Camera | - | - |
| Video Capture | - | - |
| Front Camera | - | - |
| Weight |
3 oz (85g) |
2.99 oz (85g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
3.83" x 1.84" x 0.65" (97 x 47 x 16.5 mm) |
| Form Factor | Clamshell | Clamshell |
| Platform / OS | (proprietary) | (proprietary) |
| Network Bands |
GSM: 900, 1800, 1900 |
WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | GPRS | ? |
| Features | ||
| GPS / Location | - | Yes |
| Accessibility | ||
| Adjustable Text Size | - | Yes |
| Hearing Aid Compatible | - |
Yes M4 (very compatible) |
| Multiple Languages | Yes | Yes |
| TTY/TDD (Digital) | - | Yes |
| Alerts | ||
| Ringer Profiles | - | Yes |
| Connectivity | ||
| USB | - |
Yes Micro-USB |
| Contacts | ||
| Picture ID | Yes | Yes |
| Ringer ID | Yes | Yes |
| Customization | ||
| Custom Graphics | Yes | Yes |
| Custom Ringtones | Yes | Yes |
| Real-Music Ringers | - | Yes |
| Data & Network | ||
| WAP / Web Browser | Yes | Yes |
| Input | ||
| Predictive Text Entry | Yes | Yes |
| Side Keys | Yes | - |
| Messaging | ||
| EMS / Picture Messaging | Yes | - |
| MMS | Yes | Yes |
| Text Messaging Templates | Yes | Yes |
| Productivity | ||
| Alarm | Yes | Yes |
| Calculator | Yes | Yes |
| Calendar | Yes | Yes |
| To-Do List | Yes | Yes |
| Voice Memo | Yes | Yes |
| Software | ||
| Games | Yes | - |
| Java (J2ME) | Yes | - |
| Voice | ||
| Headset Jack (2.5 mm) | Yes | - |
| Speaker Phone | Yes | Yes |
| Samsung SGH-X640 | Samsung SGH-A157 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | Samsung SGH-A157 |
