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| Phone | Samsung SGH-X640 | Samsung Behold T919 | ZTE Z221 | HTC ThunderBolt |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
3.1" diag. 5 : 3 |
2" diag. 4 : 3 |
4.3" diag. 5 : 3 |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
240 x 400 pixels (~151 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~200 ppi) LCD (TFT/TFD) |
480 x 800 pixels (~217 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? | 60 Hz |
| Battery | 800 mAh | 1,000 mAh | 900 mAh | 1,400 mAh |
| Processor | ? | ? | ? | 1 GHz Qualcomm Snapdragon S2 MSM8655 |
| RAM | ? | ? | ? | 768 MB |
| Storage | ? raw hardware | ? raw hardware | 142 MB | 8 GB |
| Main Camera | Yes | 5 megapixel | Yes | 8 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | QVGA (320 x 240) | QCIF (176 x 144) | 720p HD |
| Front Camera | - | - | - | 1 megapixel |
| Weight |
3 oz (85g) |
4 oz (113g) |
3.24 oz (92g) |
5.78 oz (164g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
4.12" x 2.1" x 0.5" (105 x 53 x 12.7 mm) |
3.76" x 1.92" x 0.73" (96 x 49 x 18.5 mm) |
4.8" x 2.6" x 0.52" (122 x 66 x 13.2 mm) |
| Form Factor | Clamshell | Slab | Clamshell | Slab |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) | Android |
| Network Bands |
GSM: 900, 1800, 1900 |
WCDMA: 4 GSM: 850, 900, 1800, 1900 |
WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 |
4G LTE: 13 CDMA: 850, 1900 |
| Data Technology | GPRS | WCDMA (UMTS) | HSDPA 3.6 | LTE (Cat 3) |
| Features | ||||
| Flashlight | - | - | - | Yes |
| GPS / Location | - | Yes | Yes | n/a |
| Accessibility | ||||
| Hearing Aid Compatible | - |
Yes M3 (mostly compatible) |
Yes M3, T3 (mostly tele-coil compatible) |
Yes |
| Multiple Languages | Yes | Yes | Yes | n/a |
| TTY/TDD (Digital) | - | - | Yes | Yes |
| Alerts | ||||
| Extra Display | - | - | Yes | - |
| Ringer Profiles | - | Yes | Yes | - |
| Connectivity | ||||
| Bluetooth | - | Yes | Yes | Yes |
| Mobile Hotspot | - | - | - | n/a |
| USB | - | Yes | Yes |
Yes Micro-USB |
| Wi-Fi | - | - | - |
Yes 4 (802.11 b,g,n) |
| Contacts | ||||
| Picture ID | Yes | Yes | - | n/a |
| Ringer ID | Yes | Yes | - | n/a |
| Voice Dialing | - | Yes | - | n/a |
| Customization | ||||
| Custom Graphics | Yes | Yes | Yes | n/a |
| Custom Ringtones | Yes | Yes | Yes | n/a |
| Real-Music Ringers | - | Yes | Yes | n/a |
| Data & Network | ||||
| Data Tethering | - | - | - | 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 |
| Touch Screen | - | Yes | - |
Yes Capacitive |
| Memory | ||||
| Memory Card Slot | - | Yes | - | Yes |
| Messaging | ||||
| Email Client | - | Yes | Yes | n/a |
| EMS / Picture Messaging | Yes | - | - | n/a |
| Instant Messaging | - | Yes | Yes | n/a |
| MMS | Yes | Yes | Yes | n/a |
| Text Messaging Templates | Yes | Yes | Yes | n/a |
| Music | ||||
| FM Radio | - | - | - | Yes |
| Headphone Jack (3.5mm) | - | - | - | Yes |
| Music Player | - | Yes | - | n/a |
| Photo & Video | ||||
| DLNA | - | - | - | Yes |
| Video Calling | - | - | - | n/a |
| 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 | ||||
| Games | Yes | Yes | Yes | n/a |
| Java (J2ME) | Yes | Yes | Yes | n/a |
| Voice | ||||
| Headset Jack (2.5 mm) | Yes | - | - | n/a |
| Speaker Phone | Yes | Yes | Yes | Yes |
| Samsung SGH-X640 | Samsung Behold T919 | ZTE Z221 | HTC ThunderBolt | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | Samsung Behold T919 | ZTE Z221 | HTC ThunderBolt |
