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| Phone | Samsung SCH-A990 | Samsung SCH-A645 | Siemens SL55 | Pantech Duo C810 |
| 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 |
240 x 320 pixels LCD (TFT/TFD) |
128 x 160 pixels LCD (STN) |
101 x 80 pixels LCD (STN) |
240 x 320 pixels (~182 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? | ? |
| Battery | 1,000 mAh | 1,000 mAh | 500 mAh | 1,320 mAh |
| Processor | ? | ? | ? | ARM 920t PXA27x |
| RAM | ? | ? | ? | ? |
| Storage | ? raw hardware | ? raw hardware | ? raw hardware | ? raw hardware |
| Main Camera | 3 megapixel | - | - | 1 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | ? | - | - | QVGA (320 x 240) |
| Front Camera | - | - | - | - |
| Weight |
4.4 oz (125g) |
3.2 oz (91g) |
2.79 oz (79g) |
3.88 oz (110g) |
| Dimensions |
3.8" x 1.88" x 0.82" (97 x 48 x 20.8 mm) |
3.54" x 1.79" x 0.94" (90 x 45 x 23.9 mm) |
3.21" x 1.75" x 0.86" (82 x 44 x 21.8 mm) |
4.01" x 1.97" x 0.78" (102 x 50 x 19.8 mm) |
| Form Factor | Clamshell | Clamshell | Slide | Slide |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) | Windows Mobile Standard |
| Network Bands |
CDMA: 850, 1900 |
CDMA: 850, 1900 AMPS: 850 |
GSM: 900, 1800, 1900 |
WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | EVDO r0 | 1xRTT | GPRS | HSDPA 1.8 |
| Features | ||||
| Flashlight | Yes | - | - | - |
| GPS / Location | Yes | Yes | - | n/a |
| Accessibility | ||||
| Hearing Aid Compatible |
Yes M3 (mostly compatible) |
Yes M3 (mostly compatible) |
- | - |
| Multiple Languages | Yes | Yes | Yes | n/a |
| TTY/TDD (Digital) | Yes | Yes | - | - |
| Alerts | ||||
| Extra Display | Yes | Yes | - | - |
| Ringer Profiles | - | - | Yes | Yes |
| Connectivity | ||||
| Bluetooth | Yes | - | - | Yes |
| Infrared (IR) | - | - | Yes | - |
| USB | Yes | - | - | Yes |
| Contacts | ||||
| Picture ID | Yes | Yes | Yes | n/a |
| Ringer ID | Yes | - | Yes | n/a |
| Voice Dialing | Yes | Yes | Yes | n/a |
| Customization | ||||
| Custom Graphics | Yes | Yes | Yes | n/a |
| Custom Ringtones | Yes | Yes | Yes | n/a |
| Real-Music Ringers | Yes | - | - | n/a |
| Data & Network | ||||
| Data Tethering | Yes | - | Yes | n/a |
| WAP / Web Browser | Yes | Yes * | Yes | n/a |
| Input | ||||
| Predictive Text Entry | Yes | Yes | Yes | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | - | - | Yes |
| Memory | ||||
| Memory Card Slot | Yes | - | - | Yes |
| Messaging | ||||
| Email Client | - | - | Yes | n/a |
| EMS / Picture Messaging | Yes | Yes | Yes | n/a |
| Instant Messaging | - | - | - | n/a |
| MMS | Yes | - | Yes | n/a |
| Text Messaging Templates | Yes | Yes | Yes | n/a |
| Music | ||||
| Music Player | Yes | - | - | n/a |
| Stereo Speakers | Yes | - | - | - |
| Photo & Video | ||||
| TV Output | Yes | - | - | - |
| Productivity | ||||
| Alarm | Yes | Yes | Yes | n/a |
| Calculator | Yes | Yes | Yes | n/a |
| Calendar | Yes | Yes | Yes | n/a |
| To-Do List | - | Yes | Yes | n/a |
| Voice Memo | Yes | Yes | Yes | n/a |
| Software | ||||
| BREW | Yes | Yes * | - | n/a |
| Games | Yes | Yes * | Yes | n/a |
| Java (J2ME) | - | - | Yes | n/a |
| Voice | ||||
| Headset Jack (2.5 mm) | - | Yes | - | n/a |
| Speaker Phone | Yes | Yes | Yes | Yes |
| * Some versions only | ||||
| Samsung SCH-A990 | Samsung SCH-A645 | Siemens SL55 | Pantech Duo C810 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SCH-A990 | Samsung SCH-A645 | Siemens SL55 | Pantech Duo C810 |
