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| Phone | Samsung M520 | ZTE Agent | Samsung Rugby A837 |
| Current U.S. Carriers | (none) | (none) | (none) |
| Global Availability | Released | Released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size |
2.1" diag. 4 : 3 |
2.4" diag. 4 : 3 |
2" diag. 4 : 3 |
| Display Resolution & Type |
176 x 220 pixels (~134 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
176 x 220 pixels (~141 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? |
| Battery | ? | 900 mAh | 1,000 mAh |
| Processor | ? | ? | ? |
| RAM | ? | ? | ? |
| Storage | ? raw hardware | ? raw hardware | ? raw hardware |
| Main Camera | 1 megapixel | 1 megapixel | 1 megapixel |
| Wide Camera | - | - | - |
| Tele Camera | - | - | - |
| Video Capture | ? | ? | QCIF (176 x 144) |
| Front Camera | - | - | - |
| Weight |
2.75 oz (78g) |
3.53 oz (100g) |
4.66 oz (132g) |
| Dimensions |
4.01" x 2.04" x 0.5" (102 x 52 x 12.7 mm) |
4.3" x 1.9" x 0.6" (109 x 48 x 15.2 mm) |
3.95" x 2.05" x 0.9" (100 x 52 x 22.9 mm) |
| Form Factor | Slide | Slab | Clamshell |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) |
| Network Bands |
CDMA: 850, 1900 |
CDMA: 850, 1700, 1900 |
WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | EVDO r0 | 1xRTT | HSDPA 3.6 |
| Features | |||
| GPS / Location | Yes | Yes | Yes |
| Ruggedized | - | - | Yes |
| Accessibility | |||
| Hearing Aid Compatible |
Yes M4 (very compatible) |
Yes M4, T4 (very tele-coil compatible) |
Yes M3, T3 (mostly tele-coil compatible) |
| Multiple Languages | Yes | Yes | Yes |
| TTY/TDD (Digital) | Yes | Yes | Yes |
| Alerts | |||
| Extra Display | - | - | Yes |
| Connectivity | |||
| Bluetooth | Yes | Yes | Yes |
| USB | Yes |
Yes Micro-USB |
Yes |
| Contacts | |||
| Picture ID | Yes | - | Yes |
| Ringer ID | Yes | Yes | Yes |
| Voice Dialing | Yes | - | - |
| Customization | |||
| Custom Graphics | Yes | Yes | Yes |
| Custom Ringtones | Yes | Yes | Yes |
| Real-Music Ringers | - | Yes | Yes |
| Data & Network | |||
| Data Tethering | Yes | - | Yes |
| WAP / Web Browser | Yes | Yes | Yes |
| Input | |||
| Predictive Text Entry | Yes | Yes | Yes |
| Side Keys | Yes | Yes | Yes |
| Memory | |||
| Memory Card Slot | Yes | Yes | Yes |
| Messaging | |||
| Email Client | - | Yes | Yes |
| Instant Messaging | - | Yes | Yes |
| MMS | - | Yes | Yes |
| Text Messaging Templates | Yes | Yes | Yes |
| Music | |||
| Headphone Jack (3.5mm) | - | Yes | - |
| Music Player | Yes | Yes | Yes |
| Productivity | |||
| Alarm | Yes | Yes | Yes |
| Calculator | Yes | Yes | Yes |
| Calendar | Yes | Yes | Yes |
| To-Do List | Yes | - | - |
| Voice Memo | Yes | Yes | Yes |
| Software | |||
| BREW | - | Yes | - |
| Games | Yes | Yes | Yes |
| Java (J2ME) | Yes | - | Yes |
| Voice | |||
| Push-To-Talk | - | - | Yes |
| Speaker Phone | Yes | Yes | Yes |
| Samsung M520 | ZTE Agent | Samsung Rugby A837 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung M520 | ZTE Agent | Samsung Rugby A837 |
