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| Phone | ZTE Z331 | LG VX-8550 Chocolate | LG PM-225 | LG VX-8500 Chocolate |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
2.4" diag. 4 : 3 |
? | ? | ? |
| Display Resolution & Type |
176 x 220 pixels (~117 ppi) LCD (TFT/TFD) |
240 x 320 pixels LCD (TFT/TFD) |
128 x 160 pixels LCD (STN) |
240 x 320 pixels LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? | ? |
| Battery | 950 mAh | 800 mAh | 1,000 mAh | 800 mAh |
| Processor | ? | ? | ? | ? |
| RAM | ? | ? | ? | ? |
| Storage | ? raw hardware | ? raw hardware | ? raw hardware | ? raw hardware |
| Main Camera | 3 megapixel | 1 megapixel | Yes | 1 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | QCIF (176 x 144) | QCIF (176 x 144) | - | QCIF (176 x 144) |
| Front Camera | - | - | - | - |
| Weight |
4 oz (113g) |
3.24 oz (92g) |
3.35 oz (95g) |
3.53 oz (100g) |
| Dimensions |
3.84" x 2.02" x 0.69" (98 x 51 x 17.5 mm) |
3.85" x 1.87" x 0.67" (98 x 47 x 17 mm) |
3.53" x 1.76" x 0.93" (90 x 45 x 23.6 mm) |
3.8" x 1.88" x 0.69" (97 x 48 x 17.5 mm) |
| Form Factor | Clamshell | Slide | Clamshell | Slide |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) | (proprietary) |
| Network Bands |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
CDMA: 850, 1900 |
CDMA: 850, 1900 AMPS: 850 |
CDMA: 850, 1900 |
| Data Technology | HSDPA 3.6 | EVDO r0 | 1xRTT | EVDO r0 |
| Features | ||||
| GPS / Location | Yes | Yes | Yes | Yes |
| Accessibility | ||||
| Hearing Aid Compatible |
Yes M3, T4 (very tele-coil compatible) |
Yes M4 (very compatible) |
- |
Yes M3 (mostly compatible) |
| Multiple Languages | Yes | Yes | Yes | Yes |
| TTY/TDD (Digital) | Yes | Yes | Yes | Yes |
| Alerts | ||||
| Extra Display | Yes | - | Yes | - |
| Ringer Profiles | Yes | - | - | - |
| Connectivity | ||||
| Bluetooth | Yes | Yes | - | Yes |
| USB |
Yes Micro-USB |
Yes | Yes | - |
| Contacts | ||||
| Picture ID | Yes | Yes | Yes | Yes |
| Ringer ID | Yes | Yes | Yes | Yes |
| Voice Dialing | - | Yes | Yes | Yes |
| Customization | ||||
| Custom Graphics | Yes | Yes | Yes | Yes |
| Custom Ringtones | Yes | Yes | Yes | Yes |
| Real-Music Ringers | Yes | Yes | - | Yes |
| Data & Network | ||||
| Data Tethering | Yes | Yes | - | Yes |
| External Antenna Jack | - | - | - | Yes |
| WAP / Web Browser | Yes | Yes | Yes | Yes |
| Input | ||||
| Predictive Text Entry | Yes | Yes | Yes | Yes |
| Side Keys | Yes | Yes | Yes | Yes |
| Memory | ||||
| Memory Card Slot | Yes | Yes | - | Yes |
| Messaging | ||||
| Email Client | Yes | - | - | - |
| Instant Messaging | Yes | - | - | - |
| MMS | Yes | Yes | - | Yes |
| Text Messaging Templates | Yes | Yes | - | Yes |
| Music | ||||
| Music Player | Yes | Yes | - | Yes |
| Productivity | ||||
| Alarm | Yes | Yes | Yes | Yes |
| Calculator | Yes | Yes | Yes | Yes |
| Calendar | Yes | Yes | Yes | Yes |
| Voice Memo | Yes | Yes | Yes | Yes |
| Software | ||||
| BREW | - | Yes | - | Yes |
| Games | Yes | Yes | Yes | Yes |
| Java (J2ME) | Yes | - | Yes | - |
| Voice | ||||
| Headset Jack (2.5 mm) | - | Yes | Yes | - |
| Speaker Phone | Yes | Yes | Yes | Yes * |
| * Some versions only | ||||
| ZTE Z331 | LG VX-8550 Chocolate | LG PM-225 | LG VX-8500 Chocolate | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | ZTE Z331 | LG VX-8550 Chocolate | LG PM-225 | LG VX-8500 Chocolate |
