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| Phone | Samsung SGH-X640 | Siemens SL55 | Sony Xperia X | ZTE Warp Elite |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? | ? |
5" diag. 16 : 9 |
5.5" diag. 16 : 9 |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
101 x 80 pixels LCD (STN) |
1080 x 1920 pixels (~441 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~267 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | 60 Hz | 60 Hz |
| Battery | 800 mAh | 500 mAh | 2,620 mAh | 3,000 mAh |
| Processor | ? | ? | 1.8 GHz Qualcomm Snapdragon 650 (MSM8956) | 1.2 GHz Qualcomm Snapdragon 410 (MSM8916) |
| RAM | ? | ? | 3 GB | 2 GB |
| Storage | ? raw hardware | ? raw hardware | 32 GB * | 16 GB |
| Main Camera | Yes | - | 23 megapixel | 13 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | - | 1080p HD | 1080p HD |
| Front Camera | - | - | 13 megapixel | 5 megapixel |
| Weight |
3 oz (85g) |
2.79 oz (79g) |
5.4 oz (153g) |
5.31 oz (151g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
3.21" x 1.75" x 0.86" (82 x 44 x 21.8 mm) |
5.6" x 2.7" x 0.3" (142 x 69 x 7.6 mm) |
6.23" x 3.06" x 0.33" (158 x 78 x 8.4 mm) |
| Form Factor | Clamshell | Slide | Slab | Slab |
| Platform / OS | (proprietary) | (proprietary) | Android | Android |
| Network Bands |
GSM: 900, 1800, 1900 |
GSM: 900, 1800, 1900 |
4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 26, 28, 40, 41 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900 |
4G LTE: 2, 4, 5, 12, 25, 26, 41 CDMA: 800, 850, 1900 |
| Data Technology | GPRS | GPRS | LTE (Cat 6) | LTE (Cat 4) |
| Features | ||||
| Fingerprint Reader | - | - | Yes * | - |
| Flashlight | - | - | Yes | Yes |
| GPS / Location | - | - | n/a | n/a |
| Accessibility | ||||
| Adjustable Text Size | - | - | n/a | n/a |
| Hearing Aid Compatible | - | - |
Yes M4, T3 (mostly tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | Yes | Yes | n/a | n/a |
| TTY/TDD (Digital) | - | - | Yes | Yes |
| Alerts | ||||
| Ringer Profiles | - | Yes | - | - |
| Connectivity | ||||
| Bluetooth | - | - | Yes | Yes |
| Infrared (IR) | - | Yes | - | - |
| MirrorLink | - | - | Yes | - |
| Mobile Hotspot | - | - | n/a | n/a |
| NFC | - | - | Yes | - |
| USB | - | - |
Yes Micro-USB |
Yes Micro-USB |
| Wi-Fi | - | - |
Yes 5 (802.11 a,ac,b,g,n) |
Yes 4 (802.11 b,g,n) |
| Contacts | ||||
| Picture ID | Yes | Yes | n/a | n/a |
| Ringer ID | Yes | Yes | n/a | n/a |
| Voice Dialing | - | Yes | n/a | n/a |
| Customization | ||||
| Custom Graphics | Yes | Yes | n/a | n/a |
| Custom Ringtones | Yes | Yes | n/a | n/a |
| Real-Music Ringers | - | - | n/a | n/a |
| Data & Network | ||||
| Data Tethering | - | Yes | n/a | n/a |
| Dual-SIM | - | - | Yes * | - |
| WAP / Web Browser | Yes | Yes | n/a | n/a |
| Input | ||||
| Predictive Text Entry | Yes | Yes | n/a | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen | - | - |
Yes Capacitive |
Yes Capacitive |
| Memory | ||||
| Memory Card Slot | - | - | Yes | Yes |
| Messaging | ||||
| Email Client | - | Yes | n/a | n/a |
| EMS / Picture Messaging | Yes | Yes | n/a | n/a |
| Instant Messaging | - | - | n/a | n/a |
| MMS | Yes | Yes | n/a | n/a |
| Text Messaging Templates | Yes | Yes | n/a | n/a |
| Music | ||||
| FM Radio | - | - | Yes | Yes |
| Headphone Jack (3.5mm) | - | - | Yes | Yes |
| Music Player | - | - | n/a | n/a |
| Photo & Video | ||||
| DLNA | - | - | Yes | - |
| Miracast | - | - | Yes | - |
| Power | ||||
| Fast Charging | - | - | Yes | Yes |
| Productivity | ||||
| Alarm | Yes | Yes | n/a | n/a |
| Calculator | Yes | Yes | n/a | n/a |
| Calendar | Yes | Yes | n/a | n/a |
| To-Do List | Yes | Yes | n/a | n/a |
| Voice Memo | Yes | Yes | n/a | n/a |
| Software | ||||
| Games | Yes | Yes | n/a | n/a |
| Java (J2ME) | Yes | Yes | n/a | n/a |
| Voice | ||||
| HD Voice | - | - | Yes | Yes |
| Headset Jack (2.5 mm) | Yes | - | n/a | n/a |
| Speaker Phone | Yes | Yes | Yes | Yes |
| * Some versions only | ||||
| Samsung SGH-X640 | Siemens SL55 | Sony Xperia X | ZTE Warp Elite | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | Siemens SL55 | Sony Xperia X | ZTE Warp Elite |
