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| Phone | Samsung SGH-E640 | Siemens SL55 | Samsung SGH-T819 | HTC HD7 / HD7S |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? | ? | ? |
4.3" diag. 5 : 3 |
| Display Resolution & Type |
176 x 220 pixels LCD (TFT/TFD) |
101 x 80 pixels LCD (STN) |
176 x 220 pixels LCD (TFT/TFD) |
480 x 800 pixels (~217 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? | ? |
| Battery | 800 mAh | 500 mAh | ? | 1,230 mAh |
| Processor | ? | ? | ? | 1 GHz Qualcomm Snapdragon S1 QSD8250 |
| RAM | ? | ? | ? | ? |
| Storage | ? raw hardware | ? raw hardware | ? raw hardware | 16 GB |
| Main Camera | 1 megapixel | - | 1 megapixel | 5 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | QCIF (176 x 144) | - | QCIF (176 x 144) | 720p HD |
| Front Camera | - | - | - | - |
| Weight |
3.17 oz (90g) |
2.79 oz (79g) |
3.46 oz (98g) |
5.71 oz (162g) |
| Dimensions |
3.37" x 1.78" x 0.93" (86 x 45 x 23.6 mm) |
3.21" x 1.75" x 0.86" (82 x 44 x 21.8 mm) |
3.96" x 2.03" x 0.55" (101 x 52 x 14 mm) |
4.8" x 2.7" x 0.44" (122 x 69 x 11.2 mm) |
| Form Factor | Clamshell | Slide | Slide | Slab |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) | Windows |
| Network Bands |
GSM: 900, 1800, 1900 |
GSM: 900, 1800, 1900 |
WCDMA: 4 GSM: 850, 900, 1800, 1900 |
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| Data Technology | GPRS | GPRS | WCDMA (UMTS) | HSPA 7.2 |
| Features | ||||
| GPS / Location | - | - | - | n/a |
| Accessibility | ||||
| Multiple Languages | Yes | Yes | Yes | n/a |
| TTY/TDD (Digital) | - | - | - | Yes |
| Alerts | ||||
| Extra Display | Yes | - | - | - |
| Ringer Profiles | - | Yes | Yes | - |
| Connectivity | ||||
| Bluetooth | Yes | - | Yes | Yes |
| Infrared (IR) | - | Yes | - | - |
| USB | Yes | - | Yes |
Yes Micro-USB |
| Wi-Fi | - | - | - |
Yes 4 (802.11 b,g,n) |
| Contacts | ||||
| Picture ID | Yes | Yes | Yes | n/a |
| Ringer ID | Yes | Yes | Yes | n/a |
| Voice Dialing | - | Yes | 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 | - | 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 |
| Touch Screen | - | - | - |
Yes Capacitive |
| Memory | ||||
| Memory Card Slot | - | - | Yes | - |
| Messaging | ||||
| Email Client | Yes | Yes | - | n/a |
| EMS / Picture Messaging | Yes | Yes | Yes | n/a |
| Instant Messaging | - | - | 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 | - | Yes | n/a |
| Stereo Speakers | - | - | - | 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 | Yes | n/a |
| Voice Memo | Yes | Yes | - | n/a |
| Software | ||||
| Games | Yes | Yes | Yes | n/a |
| Java (J2ME) | Yes | Yes | Yes | n/a |
| Voice | ||||
| Speaker Phone | Yes | Yes | Yes | Yes |
| Samsung SGH-E640 | Siemens SL55 | Samsung SGH-T819 | HTC HD7 / HD7S | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-E640 | Siemens SL55 | Samsung SGH-T819 | HTC HD7 / HD7S |
