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| Phone | Samsung SGH-X640 | ZTE Grand X | ZTE Blade Vantage | Amazon Fire |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
5" diag. 16 : 9 |
5" diag. 16 : 9 |
4.7" diag. 16 : 9 |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
540 x 960 pixels (~220 ppi) LCD (TFT/TFD) |
480 x 854 pixels (~196 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~312 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | 60 Hz | ? |
| Battery | 800 mAh | 2,300 mAh | 2,500 mAh | 2,400 mAh |
| Processor | ? | 1.2 GHz Qualcomm Snapdragon 200 MSM8210 | 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) | 2.2 GHz Qualcomm Snapdragon 800 |
| RAM | ? | 1 GB | 2 GB | 2 GB |
| Storage | ? raw hardware | 4 GB | 16 GB | 32 GB * |
| Main Camera | Yes | 5 megapixel | 8 megapixel | 13 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | 720p HD | 720p HD | 1080p HD |
| Front Camera | - | 1 megapixel | 2 megapixel | 2 megapixel |
| Weight |
3 oz (85g) |
6.06 oz (172g) |
5.29 oz (150g) |
5.64 oz (160g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
5.7" x 2.87" x 0.37" (145 x 73 x 9.4 mm) |
5.73" x 2.85" x 0.36" (146 x 72 x 9.2 mm) |
5.5" x 2.6" x 0.35" (140 x 66 x 8.9 mm) |
| Form Factor | Clamshell | Slab | Slab | Slab |
| Platform / OS | (proprietary) | Android | Android | (proprietary) |
| Network Bands |
GSM: 900, 1800, 1900 |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
4G LTE: 2, 4, 5, 13 |
4G LTE: 1, 2, 3, 4, 5, 7, 8, 17 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900 |
| Data Technology | GPRS | HSPA+ 21 | LTE (Cat 4) | LTE (Cat 4) |
| Features | ||||
| Flashlight | - | - | Yes | Yes |
| GPS / Location | - | n/a | n/a | Yes |
| Accessibility | ||||
| Adjustable Text Size | - | n/a | n/a | - |
| Hearing Aid Compatible | - |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | Yes | n/a | n/a | Yes |
| TTY/TDD (Digital) | - | Yes | Yes | Yes |
| Connectivity | ||||
| Bluetooth | - | Yes | Yes | Yes |
| Mobile Hotspot | - | n/a | n/a | Yes |
| NFC | - | - | - | Yes |
| USB | - |
Yes Micro-USB |
Yes Micro-USB |
Yes Micro-USB |
| Wi-Fi | - |
Yes 4 (802.11 b,g,n) |
Yes 4 (802.11 b,g,n) |
Yes 5 (802.11 a,ac,b,g,n) |
| Contacts | ||||
| Picture ID | Yes | n/a | n/a | Yes |
| Ringer ID | Yes | n/a | n/a | Yes |
| Voice Dialing | - | n/a | n/a | Yes |
| Customization | ||||
| Custom Graphics | Yes | n/a | n/a | - |
| Custom Ringtones | Yes | n/a | n/a | Yes |
| Real-Music Ringers | - | n/a | n/a | - |
| Data & Network | ||||
| Data Tethering | - | n/a | n/a | Yes |
| WAP / Web Browser | Yes | n/a | n/a | Yes |
| Input | ||||
| Predictive Text Entry | Yes | n/a | n/a | Yes |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen | - |
Yes Capacitive |
Yes Capacitive |
Yes Capacitive |
| Memory | ||||
| Memory Card Slot | - | Yes | Yes | - |
| Messaging | ||||
| Email Client | - | n/a | n/a | Yes |
| EMS / Picture Messaging | Yes | n/a | n/a | - |
| Instant Messaging | - | n/a | n/a | - |
| MMS | Yes | n/a | n/a | Yes |
| Text Messaging Templates | Yes | n/a | n/a | Yes |
| Music | ||||
| Headphone Jack (3.5mm) | - | Yes | Yes | Yes |
| Music Player | - | n/a | n/a | Yes |
| Stereo Speakers | - | - | - | Yes |
| Photo & Video | ||||
| Miracast | - | - | - | Yes |
| TV Output | - | - | - | Yes |
| Productivity | ||||
| Alarm | Yes | n/a | n/a | Yes |
| Calculator | Yes | n/a | n/a | Yes |
| Calendar | Yes | n/a | n/a | Yes |
| To-Do List | Yes | n/a | n/a | - |
| Voice Memo | Yes | n/a | n/a | Yes |
| Software | ||||
| Games | Yes | n/a | n/a | Yes |
| Java (J2ME) | Yes | n/a | n/a | - |
| Voice | ||||
| HD Voice | - | Yes | Yes | Yes |
| Headset Jack (2.5 mm) | Yes | n/a | n/a | - |
| Speaker Phone | Yes | Yes | Yes | Yes |
| Samsung SGH-X640 | ZTE Grand X | ZTE Blade Vantage | Amazon Fire | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | ZTE Grand X | ZTE Blade Vantage | Amazon Fire |
