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| Phone | Samsung SGH-X640 | Visible Midnight | Sharp Sidekick LX 2007 | Samsung SGH-A157 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
6.5" diag. 20 : 9 |
3" diag. 5 : 3 |
1.8" diag. 4 : 3 |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
720 x 1600 pixels (~269 ppi) LCD (TFT/TFD) |
400 x 240 pixels (~155 ppi) LCD (TFT/TFD) |
128 x 160 pixels (~116 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | ? | ? |
| Battery | 800 mAh | 4,000 mAh | 1,540 mAh | 800 mAh |
| Processor | ? | MediaTek Helio P22 (MT6762) | 200 MHz OMAP 331 | ? |
| RAM | ? | 3 GB | ? | ? |
| Storage | ? raw hardware | 32 GB | ? raw hardware | 256 MB |
| Main Camera | Yes | 13 megapixel | 1 megapixel | - |
| Wide Camera | - | 5 megapixel | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | 1080p HD | ? | - |
| Front Camera | - | 8 megapixel | - | - |
| Weight |
3 oz (85g) |
6.35 oz (180g) |
5.7 oz (162g) |
2.99 oz (85g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
6.53" x 3" x 0.34" (166 x 76 x 8.6 mm) |
5.12" x 2.36" x 0.7" (130 x 60 x 17.9 mm) |
3.83" x 1.84" x 0.65" (97 x 47 x 16.5 mm) |
| Form Factor | Clamshell | Slab | Swivel | Clamshell |
| Platform / OS | (proprietary) | Android | (proprietary) | (proprietary) |
| Network Bands |
GSM: 900, 1800, 1900 |
4G LTE: 2, 4, 5, 7, 12, 13, 66 |
GSM: 850, 900, 1800, 1900 |
WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | GPRS | LTE (Cat 4) | EDGE | ? |
| Features | ||||
| Fingerprint Reader | - |
Yes stand-alone |
- | - |
| Flashlight | - | Yes | Yes | - |
| GPS / Location | - | n/a | - | Yes |
| Accessibility | ||||
| Adjustable Text Size | - | n/a | Yes | Yes |
| Hearing Aid Compatible | - | Yes | Yes | Yes |
| Multiple Languages | Yes | n/a | - | Yes |
| TTY/TDD (Digital) | - | - | - | Yes |
| Alerts | ||||
| Ringer Profiles | - | - | Yes | Yes |
| Connectivity | ||||
| Bluetooth | - | Yes | Yes | - |
| USB | - |
Yes USB Type C |
Yes |
Yes Micro-USB |
| Wi-Fi | - |
Yes 5 (802.11 a,ac,b,g,n) |
- | - |
| Contacts | ||||
| Picture ID | Yes | n/a | Yes | Yes |
| Ringer ID | Yes | n/a | Yes | Yes |
| Customization | ||||
| Custom Graphics | Yes | n/a | Yes | Yes |
| Custom Ringtones | Yes | n/a | Yes | Yes |
| Real-Music Ringers | - | n/a | Yes | Yes |
| Data & Network | ||||
| WAP / Web Browser | Yes | n/a | Yes | Yes |
| Input | ||||
| Predictive Text Entry | Yes | n/a | - | Yes |
| Side Keys | Yes | Yes | Yes | - |
| Text Keyboard, Hardware | - | - | Yes | - |
| Touch Screen | - | Yes | - | - |
| Memory | ||||
| Memory Card Slot | - | Yes | Yes | - |
| Messaging | ||||
| Email Client | - | n/a | Yes | - |
| EMS / Picture Messaging | Yes | n/a | - | - |
| Instant Messaging | - | n/a | Yes | - |
| MMS | Yes | n/a | Yes | Yes |
| Text Messaging Templates | Yes | n/a | Yes | Yes |
| Music | ||||
| Headphone Jack (3.5mm) | - | Yes | Yes | - |
| Music Player | - | n/a | Yes | - |
| Power | ||||
| Wireless Charging | - | Yes | - | - |
| Productivity | ||||
| Alarm | Yes | n/a | Yes * | Yes |
| Calculator | Yes | n/a | - | Yes |
| Calendar | Yes | n/a | Yes | Yes |
| To-Do List | Yes | n/a | Yes | Yes |
| Voice Memo | Yes | n/a | - | Yes |
| Software | ||||
| Games | Yes | n/a | Yes | - |
| Java (J2ME) | Yes | n/a | Yes | - |
| Voice | ||||
| HD Voice | - | Yes | - | - |
| Headset Jack (2.5 mm) | Yes | n/a | - | - |
| Speaker Phone | Yes | Yes | Yes | Yes |
| * Some versions only | ||||
| Samsung SGH-X640 | Visible Midnight | Sharp Sidekick LX 2007 | Samsung SGH-A157 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | Visible Midnight | Sharp Sidekick LX 2007 | Samsung SGH-A157 |
