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| Phone | Samsung SGH-X640 | Samsung Galaxy S6 (GSM) | ZTE Prelude / Avail 2 | Palm Treo 600 (CDMA) |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
5.1" diag. 16 : 9 |
3.5" diag. 5 : 3 |
? |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
1440 x 2560 pixels (~576 ppi) AMOLED |
320 x 480 pixels (~165 ppi) LCD (TFT/TFD) |
160 x 160 pixels LCD (Color) |
| Display Refresh | ? | 60 Hz | 60 Hz | ? |
| Battery | 800 mAh | 2,550 mAh | 1,500 mAh | ? |
| Processor | ? | 2.1 GHz Samsung Exynos 7420 | 1 GHz Qualcomm Snapdragon MSM7225A | ? |
| RAM | ? | 3 GB | 512 MB | ? |
| Storage | ? raw hardware | 32 GB * | 4 GB | ? raw hardware |
| Main Camera | Yes | 16 megapixel | 2 megapixel | Yes |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | 4K UHD | VGA (640 x 480) | - |
| Front Camera | - | 5 megapixel | - | - |
| Weight |
3 oz (85g) |
4.87 oz (138g) |
4.4 oz (125g) |
6.2 oz (176g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
5.65" x 2.78" x 0.27" (143 x 71 x 6.8 mm) |
4.6" x 2.44" x 0.45" (117 x 62 x 11.4 mm) |
4.41" x 2.36" x 0.87" (112 x 60 x 22.1 mm) |
| Form Factor | Clamshell | Slab | Slab | Slab |
| Platform / OS | (proprietary) | Android | Android | Palm OS |
| Network Bands |
GSM: 900, 1800, 1900 |
WCDMA: 2, 5 GSM: 850, 1900 |
CDMA: 850, 1900 |
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| Data Technology | GPRS | LTE (Cat 6) | HSPA 7.2 | 1xRTT |
| Features | ||||
| Fingerprint Reader | - | Yes | - | - |
| Flashlight | - | Yes | - | - |
| GPS / Location | - | n/a | n/a | n/a |
| VR-ready | - | Yes | - | - |
| Accessibility | ||||
| Adjustable Text Size | - | n/a | n/a | n/a |
| Hearing Aid Compatible | - |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M3, T4 (very tele-coil compatible) |
- |
| Multiple Languages | Yes | n/a | n/a | n/a |
| TTY/TDD (Digital) | - | Yes | Yes | Yes |
| Connectivity | ||||
| Bluetooth | - | Yes | Yes | - |
| Infrared (IR) | - | Yes | - | Yes |
| MirrorLink | - | Yes | - | - |
| NFC | - | Yes | - | - |
| USB | - |
Yes Micro-USB |
Yes | Yes |
| Wi-Fi | - |
Yes 5 (802.11 a,ac,b,g,n) |
Yes 4 (802.11 b,g,n) |
- |
| Contacts | ||||
| Picture ID | Yes | n/a | n/a | n/a |
| Ringer ID | Yes | n/a | n/a | n/a |
| Voice Dialing | - | n/a | n/a | n/a |
| Customization | ||||
| Custom Graphics | Yes | n/a | n/a | n/a |
| Custom Ringtones | Yes | n/a | n/a | n/a |
| Real-Music Ringers | - | n/a | n/a | n/a |
| Data & Network | ||||
| Data Tethering | - | n/a | n/a | n/a |
| WAP / Web Browser | Yes | n/a | n/a | n/a |
| Input | ||||
| Predictive Text Entry | Yes | n/a | n/a | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | - | - | Yes |
| Touch Screen | - |
Yes Capacitive |
Yes Capacitive |
Yes |
| Memory | ||||
| Memory Card Slot | - | - | Yes | Yes |
| Messaging | ||||
| Email Client | - | n/a | n/a | n/a |
| EMS / Picture Messaging | Yes | n/a | n/a | n/a |
| Instant Messaging | - | n/a | n/a | n/a |
| MMS | Yes | n/a | n/a | n/a |
| Text Messaging Templates | Yes | n/a | n/a | n/a |
| Music | ||||
| Headphone Jack (3.5mm) | - | Yes | Yes | - |
| Music Player | - | n/a | n/a | n/a |
| Photo & Video | ||||
| DLNA | - | Yes | - | - |
| Miracast | - | Yes | - | - |
| TV Output | - | Yes | - | - |
| Power | ||||
| Fast Charging | - | Yes | - | - |
| Wireless Charging | - | Yes | - | - |
| Productivity | ||||
| Alarm | Yes | n/a | n/a | n/a |
| Calculator | Yes | n/a | n/a | n/a |
| Calendar | Yes | n/a | n/a | n/a |
| To-Do List | Yes | n/a | n/a | n/a |
| Voice Memo | Yes | n/a | n/a | n/a |
| Software | ||||
| Games | Yes | n/a | n/a | n/a |
| Java (J2ME) | Yes | n/a | n/a | n/a |
| Voice | ||||
| HD Voice | - | Yes | - | - |
| Headset Jack (2.5 mm) | Yes | n/a | n/a | n/a |
| Speaker Phone | Yes | Yes | Yes | Yes |
| Samsung SGH-X640 | Samsung Galaxy S6 (GSM) | ZTE Prelude / Avail 2 | Palm Treo 600 (CDMA) | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | Samsung Galaxy S6 (GSM) | ZTE Prelude / Avail 2 | Palm Treo 600 (CDMA) |
