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| Phone | HTC ThunderBolt | Samsung Ace SPH-i325 | Samsung SCH-A990 | Nokia N81 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
4.3" diag. 5 : 3 |
2.3" diag. 4 : 3 |
? |
2.4" diag. 4 : 3 |
| Display Resolution & Type |
480 x 800 pixels (~217 ppi) LCD (TFT/TFD) |
320 x 240 pixels (~174 ppi) LCD (TFT/TFD) |
240 x 320 pixels LCD (TFT/TFD) |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
| Display Refresh | 60 Hz | ? | ? | ? |
| Battery | 1,400 mAh | 1,300 mAh | 1,000 mAh | 1,050 mAh |
| Processor | 1 GHz Qualcomm Snapdragon S2 MSM8655 | 416 MHz PXA270 | ? | 369 MHz ARM 11 |
| RAM | 768 MB | ? | ? | ? |
| Storage | 8 GB | ? raw hardware | ? raw hardware | 8 GB * |
| Main Camera | 8 megapixel | 1 megapixel | 3 megapixel | 2 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | 720p HD | QVGA (320 x 240) | ? | VGA (640 x 480) |
| Front Camera | 1 megapixel | - | - | - |
| Weight |
5.78 oz (164g) |
3.9 oz (111g) |
4.4 oz (125g) |
4.94 oz (140g) |
| Dimensions |
4.8" x 2.6" x 0.52" (122 x 66 x 13.2 mm) |
4.65" x 2.32" x 0.46" (118 x 59 x 11.7 mm) |
3.8" x 1.88" x 0.82" (97 x 48 x 20.8 mm) |
4.02" x 1.97" x 0.7" (102 x 50 x 17.8 mm) |
| Form Factor | Slab | Slab | Clamshell | Slide |
| Platform / OS | Android | Windows Mobile Standard | (proprietary) | S60 (Symbian) |
| Network Bands |
4G LTE: 13 CDMA: 850, 1900 |
CDMA: 850, 1900 GSM: 900, 1800 |
CDMA: 850, 1900 |
WCDMA: 1 GSM: 850, 900, 1800, 1900 |
| Data Technology | LTE (Cat 3) | EVDO r0 | EVDO r0 | EDGE |
| Features | ||||
| Flashlight | Yes | - | Yes | - |
| GPS / Location | n/a | n/a | Yes | n/a |
| Accessibility | ||||
| Hearing Aid Compatible | Yes |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M3 (mostly compatible) |
- |
| Multiple Languages | n/a | n/a | Yes | n/a |
| TTY/TDD (Digital) | Yes | Yes | Yes | - |
| Alerts | ||||
| Extra Display | - | - | Yes | - |
| Ringer Profiles | - | Yes | - | Yes |
| Connectivity | ||||
| Bluetooth | Yes | Yes | Yes | Yes |
| Mobile Hotspot | n/a | n/a | - | n/a |
| USB |
Yes Micro-USB |
Yes | Yes |
Yes Micro-USB |
| Wi-Fi |
Yes 4 (802.11 b,g,n) |
- | - |
Yes 802.11 b,g |
| Contacts | ||||
| Picture ID | n/a | n/a | Yes | n/a |
| Ringer ID | n/a | n/a | Yes | n/a |
| Voice Dialing | n/a | n/a | Yes | n/a |
| Customization | ||||
| Custom Graphics | n/a | n/a | Yes | n/a |
| Custom Ringtones | n/a | n/a | Yes | n/a |
| Real-Music Ringers | n/a | n/a | Yes | n/a |
| Data & Network | ||||
| Data Tethering | n/a | n/a | Yes | n/a |
| WAP / Web Browser | n/a | n/a | Yes | n/a |
| Input | ||||
| Predictive Text Entry | n/a | n/a | Yes | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | Yes | - | - |
| Touch Screen |
Yes Capacitive |
- | - | - |
| Memory | ||||
| Memory Card Slot | Yes | Yes | Yes | Yes * |
| Messaging | ||||
| Email Client | n/a | n/a | - | n/a |
| EMS / Picture Messaging | n/a | n/a | Yes | n/a |
| Instant Messaging | n/a | n/a | - | n/a |
| MMS | n/a | n/a | Yes | n/a |
| Text Messaging Templates | n/a | n/a | Yes | n/a |
| Music | ||||
| FM Radio | Yes | - | - | Yes |
| Headphone Jack (3.5mm) | Yes | - | - | Yes |
| Music Player | n/a | n/a | Yes | n/a |
| Stereo Speakers | - | - | Yes | Yes |
| Photo & Video | ||||
| DLNA | Yes | - | - | - |
| TV Output | - | - | Yes | - |
| Video Calling | n/a | n/a | - | n/a |
| Productivity | ||||
| Alarm | n/a | n/a | Yes | n/a |
| Calculator | n/a | n/a | Yes | n/a |
| Calendar | n/a | n/a | Yes | n/a |
| To-Do List | n/a | n/a | - | n/a |
| Voice Memo | n/a | n/a | Yes | n/a |
| Software | ||||
| BREW | n/a | n/a | Yes | n/a |
| Games | n/a | n/a | Yes | n/a |
| Java (J2ME) | n/a | n/a | - | n/a |
| Voice | ||||
| Push-To-Talk | - | - | - | Yes * |
| Speaker Phone | Yes | Yes | Yes | Yes |
| * Some versions only | ||||
| HTC ThunderBolt | Samsung Ace SPH-i325 | Samsung SCH-A990 | Nokia N81 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | HTC ThunderBolt | Samsung Ace SPH-i325 | Samsung SCH-A990 | Nokia N81 |
