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| Phone | Amazon Fire | Sharp Aquos Crystal | Samsung SGH-X640 |
| Current U.S. Carriers | (none) | (none) | (none) |
| Global Availability | Released | Released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size |
4.7" diag. 16 : 9 |
5" diag. 16 : 9 |
? |
| Display Resolution & Type |
720 x 1280 pixels (~312 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~294 ppi) LCD (TFT/TFD) |
128 x 160 pixels LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | ? |
| Battery | 2,400 mAh | 2,040 mAh | 800 mAh |
| Processor | 2.2 GHz Qualcomm Snapdragon 800 | 1.2 GHz Qualcomm Snapdragon 400 MSM8926 | ? |
| RAM | 2 GB | 1.5 GB | ? |
| Storage | 32 GB * | 8 GB | ? raw hardware |
| Main Camera | 13 megapixel | 8 megapixel | Yes |
| Wide Camera | - | - | - |
| Tele Camera | - | - | - |
| Video Capture | 1080p HD | 1080p HD | - |
| Front Camera | 2 megapixel | 1 megapixel | - |
| Weight |
5.64 oz (160g) |
4.97 oz (141g) |
3 oz (85g) |
| Dimensions |
5.5" x 2.6" x 0.35" (140 x 66 x 8.9 mm) |
5.16" x 2.6" x 0.4" (131 x 66 x 10.2 mm) |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
| Form Factor | Slab | Slab | Clamshell |
| Platform / OS | (proprietary) | Android | (proprietary) |
| Network Bands |
4G LTE: 1, 2, 3, 4, 5, 7, 8, 17 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900 |
4G LTE: 25, 26, 41 CDMA: 800, 850, 1900 |
GSM: 900, 1800, 1900 |
| Data Technology | LTE (Cat 4) | LTE (Cat 4) | GPRS |
| Features | |||
| Flashlight | Yes | - | - |
| GPS / Location | Yes | n/a | - |
| Accessibility | |||
| Adjustable Text Size | - | n/a | - |
| Hearing Aid Compatible |
Yes M4, T4 (very tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
- |
| Multiple Languages | Yes | n/a | Yes |
| TTY/TDD (Digital) | Yes | Yes | - |
| Connectivity | |||
| Bluetooth | Yes | Yes | - |
| Mobile Hotspot | Yes | 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 | n/a | Yes |
| Ringer ID | Yes | n/a | Yes |
| Voice Dialing | Yes | n/a | - |
| Customization | |||
| Custom Graphics | - | n/a | Yes |
| Custom Ringtones | Yes | n/a | Yes |
| Real-Music Ringers | - | n/a | - |
| Data & Network | |||
| Data Tethering | Yes | n/a | - |
| WAP / Web Browser | Yes | n/a | Yes |
| Input | |||
| Predictive Text Entry | Yes | n/a | Yes |
| Side Keys | Yes | Yes | Yes |
| Touch Screen |
Yes Capacitive |
Yes Capacitive |
- |
| Memory | |||
| Memory Card Slot | - | Yes | - |
| Messaging | |||
| Email Client | Yes | n/a | - |
| EMS / Picture Messaging | - | n/a | Yes |
| Instant Messaging | - | n/a | - |
| MMS | Yes | n/a | Yes |
| Text Messaging Templates | Yes | n/a | Yes |
| Music | |||
| Headphone Jack (3.5mm) | Yes | Yes | - |
| Music Player | Yes | n/a | - |
| Stereo Speakers | Yes | - | - |
| Photo & Video | |||
| Miracast | Yes | Yes | - |
| TV Output | Yes | - | - |
| Productivity | |||
| Alarm | Yes | n/a | Yes |
| Calculator | Yes | n/a | Yes |
| Calendar | Yes | n/a | Yes |
| To-Do List | - | n/a | Yes |
| Voice Memo | Yes | n/a | Yes |
| Software | |||
| Games | Yes | n/a | Yes |
| Java (J2ME) | - | n/a | Yes |
| Voice | |||
| HD Voice | Yes | Yes | - |
| Headset Jack (2.5 mm) | - | n/a | Yes |
| Speaker Phone | Yes | Yes | Yes |
| Amazon Fire | Sharp Aquos Crystal | Samsung SGH-X640 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Amazon Fire | Sharp Aquos Crystal | Samsung SGH-X640 |
