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| Phone | Samsung M400 | Samsung SGH-E640 | Samsung SPH-N400 | Samsung SCH-A990 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
2.4" diag. 4 : 3 |
? | ? | ? |
| Display Resolution & Type |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
176 x 220 pixels LCD (TFT/TFD) |
128 x 128 pixels LCD (STN) |
240 x 320 pixels LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? | ? |
| Battery | 1,000 mAh | 800 mAh | ? | 1,000 mAh |
| Processor | 400 MHz Qualcomm QSC6155 | ? | ? | ? |
| RAM | 128 MB | ? | ? | ? |
| Storage | 256 MB | ? raw hardware | ? raw hardware | ? raw hardware |
| Main Camera | 1 megapixel | 1 megapixel | - | 3 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | QCIF (176 x 144) | - | ? |
| Front Camera | - | - | - | - |
| Weight |
3.7 oz (105g) |
3.17 oz (90g) |
4 oz (113g) |
4.4 oz (125g) |
| Dimensions |
3.8" x 1.9" x 0.7" (97 x 48 x 17.8 mm) |
3.37" x 1.78" x 0.93" (86 x 45 x 23.6 mm) |
4.25" x 2.04" x 0.82" (108 x 52 x 20.8 mm) |
3.8" x 1.88" x 0.82" (97 x 48 x 20.8 mm) |
| Form Factor | Clamshell | Clamshell | Flip | Clamshell |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) | (proprietary) |
| Network Bands |
CDMA: 800, 850, 1900 |
GSM: 900, 1800, 1900 |
CDMA: 850, 1900 AMPS: 850 |
CDMA: 850, 1900 |
| Data Technology | 1xRTT | GPRS | 1xRTT | EVDO r0 |
| Features | ||||
| Flashlight | - | - | - | Yes |
| GPS / Location | Yes | - | Yes | Yes |
| Accessibility | ||||
| Adjustable Text Size | Yes | - | - | - |
| Hearing Aid Compatible |
Yes M4, T4 (very tele-coil compatible) |
- | - |
Yes M3 (mostly compatible) |
| Multiple Languages | Yes | Yes | Yes | Yes |
| TTY/TDD (Digital) | Yes | - | Yes | Yes |
| Alerts | ||||
| Extra Display | Yes | Yes | - | Yes |
| Connectivity | ||||
| Bluetooth | Yes | Yes | - | Yes |
| USB |
Yes Micro-USB |
Yes | Yes | Yes |
| 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 | - | Yes |
| Data & Network | ||||
| Data Tethering | - | - | Yes | Yes |
| WAP / Web Browser | Yes | Yes | Yes | Yes |
| Input | ||||
| Predictive Text Entry | Yes | Yes | Yes | Yes |
| Side Keys | Yes | Yes | Yes | Yes |
| Memory | ||||
| Memory Card Slot | - | - | - | Yes |
| Messaging | ||||
| Email Client | - | Yes | - | - |
| EMS / Picture Messaging | - | Yes | - | Yes |
| MMS | Yes | Yes | - | Yes |
| Text Messaging Templates | Yes | Yes | - | Yes |
| Music | ||||
| Headphone Jack (3.5mm) | Yes | - | - | - |
| Music Player | - | Yes | - | Yes |
| Stereo Speakers | - | - | - | Yes |
| Photo & Video | ||||
| TV Output | - | - | - | Yes |
| Productivity | ||||
| Alarm | Yes | Yes | Yes | Yes |
| Calculator | Yes | Yes | Yes | Yes |
| Calendar | Yes | Yes | Yes | Yes |
| To-Do List | - | 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 | - |
| Speaker Phone | Yes | Yes | Yes | Yes |
| Samsung M400 | Samsung SGH-E640 | Samsung SPH-N400 | Samsung SCH-A990 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung M400 | Samsung SGH-E640 | Samsung SPH-N400 | Samsung SCH-A990 |
