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| Phone | ZTE Avid 4 | Motorola EM330 / EM28 | ZTE Z331 | Amazon Fire |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
5" diag. 16 : 9 |
1.8" diag. 4 : 3 |
2.4" diag. 4 : 3 |
4.7" diag. 16 : 9 |
| Display Resolution & Type |
480 x 854 pixels (~196 ppi) LCD (TFT/TFD) |
128 x 160 pixels (~114 ppi) LCD (TFT/TFD) |
176 x 220 pixels (~117 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~312 ppi) LCD (TFT/TFD) |
| Display Refresh | 60 Hz | ? | ? | ? |
| Battery | 2,520 mAh | 940 mAh | 950 mAh | 2,400 mAh |
| Processor | 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) | ? | ? | 2.2 GHz Qualcomm Snapdragon 800 |
| RAM | 2 GB | ? | ? | 2 GB |
| Storage | 16 GB | ? raw hardware | ? raw hardware | 32 GB * |
| Main Camera | 8 megapixel | 1 megapixel | 3 megapixel | 13 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | 720p HD | ? | QCIF (176 x 144) | 1080p HD |
| Front Camera | 5 megapixel | - | - | 2 megapixel |
| Weight |
5.6 oz (159g) |
3.17 oz (90g) |
4 oz (113g) |
5.64 oz (160g) |
| Dimensions |
5.7" x 2.8" x 0.36" (145 x 71 x 9.1 mm) |
3.71" x 1.95" x 0.68" (94 x 50 x 17.4 mm) |
3.84" x 2.02" x 0.69" (98 x 51 x 17.5 mm) |
5.5" x 2.6" x 0.35" (140 x 66 x 8.9 mm) |
| Form Factor | Slab | Clamshell | Clamshell | Slab |
| Platform / OS | Android | (proprietary) | (proprietary) | (proprietary) |
| Network Bands |
4G LTE: 2, 4, 5, 12, 66 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 |
GSM: 850, 1800, 1900 |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
4G LTE: 1, 2, 3, 4, 5, 7, 8, 17 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900 |
| Data Technology | LTE (Cat 4) | EDGE | HSDPA 3.6 | LTE (Cat 4) |
| Features | ||||
| Flashlight | Yes | - | - | Yes |
| GPS / Location | n/a | - | Yes | Yes |
| Accessibility | ||||
| Hearing Aid Compatible |
Yes M4, T3 (mostly tele-coil compatible) |
Yes M3 (mostly compatible) |
Yes M3, T4 (very tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | n/a | Yes | Yes | Yes |
| TTY/TDD (Digital) | Yes | Yes | Yes | Yes |
| Alerts | ||||
| Extra Display | - | Yes | Yes | - |
| Ringer Profiles | - | - | Yes | - |
| Connectivity | ||||
| Bluetooth | Yes | Yes | Yes | Yes |
| Mobile Hotspot | n/a | - | - | Yes |
| NFC | - | - | - | Yes |
| USB |
Yes Micro-USB |
Yes Mini-USB |
Yes Micro-USB |
Yes Micro-USB |
| Wi-Fi |
Yes 4 (802.11 b,g,n) |
- | - |
Yes 5 (802.11 a,ac,b,g,n) |
| Contacts | ||||
| Picture ID | n/a | - | Yes | Yes |
| Ringer ID | n/a | - | Yes | Yes |
| Voice Dialing | n/a | - | - | Yes |
| Customization | ||||
| Custom Graphics | n/a | Yes | Yes | - |
| Custom Ringtones | n/a | Yes | Yes | Yes |
| Real-Music Ringers | n/a | Yes | Yes | - |
| Data & Network | ||||
| Data Tethering | n/a | - | Yes | Yes |
| WAP / Web Browser | n/a | Yes | Yes | Yes |
| Input | ||||
| Predictive Text Entry | n/a | Yes | Yes | Yes |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen |
Yes Capacitive |
- | - |
Yes Capacitive |
| Memory | ||||
| Memory Card Slot | Yes | Yes | Yes | - |
| Messaging | ||||
| Email Client | n/a | - | Yes | Yes |
| EMS / Picture Messaging | n/a | Yes | - | - |
| Instant Messaging | n/a | - | Yes | - |
| MMS | n/a | Yes | Yes | Yes |
| Text Messaging Templates | n/a | Yes | Yes | Yes |
| Music | ||||
| FM Radio | Yes | Yes | - | - |
| Headphone Jack (3.5mm) | Yes | Yes | - | Yes |
| Music Player | n/a | Yes | Yes | Yes |
| Stereo Speakers | - | - | - | Yes |
| Photo & Video | ||||
| Miracast | - | - | - | Yes |
| TV Output | - | - | - | Yes |
| Productivity | ||||
| Alarm | n/a | Yes | Yes | Yes |
| Calculator | n/a | Yes | Yes | Yes |
| Calendar | n/a | Yes | Yes | Yes |
| Voice Memo | n/a | - | Yes | Yes |
| Software | ||||
| Games | n/a | Yes | Yes | Yes |
| Java (J2ME) | n/a | Yes | Yes | - |
| Voice | ||||
| HD Voice | Yes | - | - | Yes |
| Speaker Phone | Yes | Yes | Yes | Yes |
| ZTE Avid 4 | Motorola EM330 / EM28 | ZTE Z331 | Amazon Fire | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | ZTE Avid 4 | Motorola EM330 / EM28 | ZTE Z331 | Amazon Fire |
