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| Phone | ZTE Z331 | Samsung SPH-A800 / MM-A800 | Samsung SGH-X820 | HTC Radar |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
2.4" diag. 4 : 3 |
? | ? |
3.8" diag. 5 : 3 |
| Display Resolution & Type |
176 x 220 pixels (~117 ppi) LCD (TFT/TFD) |
240 x 320 pixels LCD (TFT/TFD) |
220 x 176 pixels LCD (TFT/TFD) |
480 x 800 pixels (~246 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? | ? |
| Battery | 950 mAh | ? | 650 mAh | 1,520 mAh |
| Processor | ? | ? | ? | 1 GHz Qualcomm Snapdragon S2 MSM8255 |
| RAM | ? | ? | ? | ? |
| Storage | ? raw hardware | ? raw hardware | ? raw hardware | 8 GB |
| Main Camera | 3 megapixel | 2 megapixel | 2 megapixel | 5 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | QCIF (176 x 144) | QCIF (176 x 144) | ? | 720p HD |
| Front Camera | - | - | - | Yes |
| Weight |
4 oz (113g) |
5.08 oz (144g) |
2.33 oz (66g) |
4.83 oz (137g) |
| Dimensions |
3.84" x 2.02" x 0.69" (98 x 51 x 17.5 mm) |
3.94" x 1.93" x 1.02" (100 x 49 x 25.9 mm) |
4.45" x 1.97" x 0.27" (113 x 50 x 6.9 mm) |
4.7" x 2.4" x 0.43" (119 x 61 x 10.9 mm) |
| Form Factor | Clamshell | Slide | Slab | Slab |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) | Windows |
| Network Bands |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
CDMA: 850, 1900 AMPS: 850 |
GSM: 900, 1800, 1900 |
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| Data Technology | HSDPA 3.6 | 1xRTT | EDGE | HSPA 14.4 |
| Features | ||||
| GPS / Location | Yes | Yes | - | n/a |
| Accessibility | ||||
| Hearing Aid Compatible | Yes | - | - | Yes |
| Multiple Languages | Yes | Yes | Yes | n/a |
| TTY/TDD (Digital) | Yes | Yes | - | Yes |
| Alerts | ||||
| Extra Display | Yes | - | - | - |
| Ringer Profiles | Yes | - | - | - |
| Connectivity | ||||
| Bluetooth |
Yes Classic Audio |
- |
Yes Classic Audio |
Yes Classic Audio |
| Mobile Hotspot | - | - | - | n/a |
| USB |
Yes Micro-USB |
Yes | Yes |
Yes Micro-USB |
| Wi-Fi | - | - | - |
Yes 4 (802.11 b,g,n) |
| Contacts | ||||
| Picture ID | Yes | Yes | Yes | n/a |
| Ringer ID | Yes | Yes | Yes | n/a |
| Voice Dialing | - | Yes | - | n/a |
| Customization | ||||
| Custom Graphics | Yes | Yes | Yes | n/a |
| Custom Ringtones | Yes | Yes | Yes | n/a |
| Real-Music Ringers | Yes | - | Yes | n/a |
| Data & Network | ||||
| Data Tethering | Yes | - | - | n/a |
| External Antenna Jack | - | - | Yes | n/a |
| WAP / Web Browser | Yes | Yes | Yes | n/a |
| Input | ||||
| Predictive Text Entry | Yes | Yes | Yes | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen | - | - | - | Yes |
| Memory | ||||
| Memory Card Slot | Yes | Yes | - | - |
| Messaging | ||||
| Email Client | Yes | - | Yes | n/a |
| EMS / Picture Messaging | - | - | Yes | n/a |
| Instant Messaging | Yes | - | - | n/a |
| MMS | Yes | - | Yes | n/a |
| Text Messaging Templates | Yes | Yes | Yes | n/a |
| Music | ||||
| FM Radio | - | - | - | Yes |
| Headphone Jack (3.5mm) | - | - | - | Yes |
| Music Player | Yes | Yes | - | n/a |
| Photo & Video | ||||
| TV Output | - | - | Yes | - |
| Productivity | ||||
| Alarm | Yes | Yes | Yes | n/a |
| Calculator | Yes | Yes | Yes | n/a |
| Calendar | Yes | Yes | Yes | n/a |
| To-Do List | - | Yes | Yes | n/a |
| Voice Memo | Yes | Yes | Yes | n/a |
| Software | ||||
| Games | Yes | Yes | Yes | n/a |
| Java (J2ME) | Yes | Yes | Yes | n/a |
| Voice | ||||
| Headset Jack (2.5 mm) | - | Yes | - | n/a |
| Speaker Phone | Yes | - | Yes | Yes |
| * Some versions only | ||||
| ZTE Z331 | Samsung SPH-A800 / MM-A800 | Samsung SGH-X820 | HTC Radar | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | ZTE Z331 | Samsung SPH-A800 / MM-A800 | Samsung SGH-X820 | HTC Radar |
