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| Phone | Samsung SGH-X640 | ZTE Agent | Samsung Droid Charge | Ericsson T66 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
2.4" diag. 4 : 3 |
4.3" diag. 5 : 3 |
? |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
480 x 800 pixels (~217 ppi) AMOLED |
? |
| Display Refresh | ? | ? | 60 Hz | ? |
| Battery | 800 mAh | 900 mAh | 1,500 mAh | ? |
| Processor | ? | ? | 1 GHz Samsung Hummingbird | ? |
| RAM | ? | ? | ? | ? |
| Storage | ? raw hardware | ? raw hardware | ? raw hardware | ? raw hardware |
| Main Camera | Yes | 1 megapixel | 8 megapixel | - |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | ? | 720p HD | - |
| Front Camera | - | - | 1 megapixel | - |
| Weight |
3 oz (85g) |
3.53 oz (100g) |
5.06 oz (144g) |
2.08 oz (59g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
4.3" x 1.9" x 0.6" (109 x 48 x 15.2 mm) |
5.1" x 2.68" x 0.46" (130 x 68 x 11.7 mm) |
3.62" x 1.61" x 0.69" (92 x 41 x 17.5 mm) |
| Form Factor | Clamshell | Slab | Slab | Slab |
| Platform / OS | (proprietary) | (proprietary) | Android | (proprietary) |
| Network Bands |
GSM: 900, 1800, 1900 |
CDMA: 850, 1700, 1900 |
4G LTE: 13 CDMA: 850, 1900 |
GSM: 900, 1800, 1900 |
| Data Technology | GPRS | 1xRTT | LTE (Cat 3) | - |
| Features | ||||
| GPS / Location | - | Yes | n/a | - |
| Accessibility | ||||
| Hearing Aid Compatible | - |
Yes M4, T4 (very tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
- |
| Multiple Languages | Yes | Yes | n/a | Yes |
| TTY/TDD (Digital) | - | Yes | Yes | - |
| Alerts | ||||
| Ringer Profiles | - | - | - | Yes |
| Connectivity | ||||
| Bluetooth | - | Yes | Yes | - |
| Mobile Hotspot | - | - | n/a | - |
| USB | - |
Yes Micro-USB |
Yes Micro-USB |
- |
| Wi-Fi | - | - |
Yes 4 (802.11 b,g,n) |
- |
| Contacts | ||||
| Picture ID | Yes | - | n/a | - |
| Ringer ID | Yes | Yes | n/a | - |
| Voice Dialing | - | - | n/a | - |
| Customization | ||||
| 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 | - |
| 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 | - |
| Messaging | ||||
| Email Client | - | Yes | n/a | - |
| EMS / Picture Messaging | Yes | - | n/a | Yes |
| Instant Messaging | - | Yes | n/a | - |
| MMS | Yes | Yes | n/a | - |
| Text Messaging Templates | Yes | Yes | n/a | Yes |
| Music | ||||
| Headphone Jack (3.5mm) | - | Yes | Yes | - |
| Music Player | - | Yes | n/a | - |
| Photo & Video | ||||
| DLNA | - | - | Yes | - |
| TV Output | - | - | Yes | - |
| Video Calling | - | - | n/a | - |
| 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 | Yes |
| Voice Memo | Yes | Yes | n/a | - |
| Software | ||||
| BREW | - | Yes | n/a | - |
| Games | Yes | Yes | n/a | Yes |
| Java (J2ME) | Yes | - | n/a | - |
| Voice | ||||
| Headset Jack (2.5 mm) | Yes | - | n/a | - |
| Speaker Phone | Yes | Yes | Yes | - |
| Samsung SGH-X640 | ZTE Agent | Samsung Droid Charge | Ericsson T66 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | ZTE Agent | Samsung Droid Charge | Ericsson T66 |
