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| Phone | Ericsson T28 World | Apple iPhone 4 (CDMA) | BlackBerry Storm2 9550 | Siemens SL55 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
3.5" diag. 5 : 3 |
3.3" diag. 4 : 3 |
? |
| Display Resolution & Type | ? |
640 x 960 pixels (~330 ppi) LCD (TFT/TFD) |
360 x 480 pixels (~185 ppi) LCD (TFT/TFD) |
101 x 80 pixels LCD (STN) |
| Display Refresh | ? | 60 Hz | ? | ? |
| Battery | 500 mAh | ? | 1,400 mAh | 500 mAh |
| Processor | ? | ? | ? | ? |
| RAM | ? | ? | ? | ? |
| Storage | ? raw hardware | 8 GB * | ? raw hardware | ? raw hardware |
| Main Camera | - | 5 megapixel | 3 megapixel | - |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | 720p HD | ? | - |
| Front Camera | - | Yes | - | - |
| Weight |
3.14 oz (89g) |
4.8 oz (136g) |
5.64 oz (160g) |
2.79 oz (79g) |
| Dimensions |
3.9" x 2" x 0.6" (99 x 51 x 15.2 mm) |
4.5" x 2.31" x 0.37" (114 x 59 x 9.4 mm) |
4.43" x 2.45" x 0.55" (113 x 62 x 14 mm) |
3.21" x 1.75" x 0.86" (82 x 44 x 21.8 mm) |
| Form Factor | Flip | Slab | Slab | Slide |
| Platform / OS | (proprietary) | iOS | BlackBerry OS | (proprietary) |
| Network Bands |
GSM: 900, 1900 |
CDMA: 850, 1900 |
WCDMA: 1 CDMA: 850, 1900 GSM: 850, 900, 1800, 1900 |
GSM: 900, 1800, 1900 |
| Data Technology | - | EVDO rA | EVDO rA | GPRS |
| Features | ||||
| GPS / Location | - | n/a | n/a | - |
| Accessibility | ||||
| Adjustable Text Size | - | n/a | n/a | - |
| Hearing Aid Compatible | - |
Yes M4, T4 (very tele-coil compatible) |
Yes M3 (mostly compatible) |
- |
| Multiple Languages | - | n/a | n/a | Yes |
| TTY/TDD (Digital) | - | - | Yes | - |
| Alerts | ||||
| Ringer Profiles | Yes | - | Yes | Yes |
| Connectivity | ||||
| Bluetooth | - | Yes | Yes | - |
| Infrared (IR) | - | - | - | Yes |
| Mobile Hotspot | - | n/a | n/a | - |
| USB | - | Yes | Yes | - |
| Wi-Fi | - |
Yes 4 (802.11 b,g,n) |
Yes 802.11 b,g |
- |
| Contacts | ||||
| Picture ID | - | n/a | n/a | Yes |
| Ringer ID | - | n/a | n/a | Yes |
| Voice Dialing | Yes | n/a | n/a | Yes |
| Customization | ||||
| Custom Graphics | - | n/a | n/a | Yes |
| Custom Ringtones | Yes | n/a | n/a | Yes |
| Real-Music Ringers | - | n/a | n/a | - |
| Data & Network | ||||
| Data Tethering | Yes | n/a | n/a | Yes |
| WAP / Web Browser | - | n/a | n/a | Yes |
| Input | ||||
| Predictive Text Entry | - | n/a | n/a | Yes |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen | - |
Yes Capacitive |
Yes Capacitive |
- |
| Memory | ||||
| Memory Card Slot | - | - | Yes | - |
| Messaging | ||||
| Email Client | - | n/a | n/a | Yes |
| EMS / Picture Messaging | - | n/a | n/a | Yes |
| Instant Messaging | - | n/a | n/a | - |
| MMS | - | n/a | n/a | Yes |
| Text Messaging Templates | - | n/a | n/a | Yes |
| Music | ||||
| Headphone Jack (3.5mm) | - | Yes | Yes | - |
| Music Player | - | n/a | n/a | - |
| Photo & Video | ||||
| TV Output | - | Yes | - | - |
| Video Calling | - | n/a | n/a | - |
| Productivity | ||||
| Alarm | Yes | n/a | n/a | Yes |
| Calculator | Yes | n/a | n/a | Yes |
| Calendar | - | n/a | n/a | Yes |
| To-Do List | - | n/a | n/a | Yes |
| Voice Memo | - | n/a | n/a | Yes |
| Software | ||||
| Games | Yes | n/a | n/a | Yes |
| Java (J2ME) | - | n/a | n/a | Yes |
| Voice | ||||
| Speaker Phone | - | Yes | Yes | Yes |
| Ericsson T28 World | Apple iPhone 4 (CDMA) | BlackBerry Storm2 9550 | Siemens SL55 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Ericsson T28 World | Apple iPhone 4 (CDMA) | BlackBerry Storm2 9550 | Siemens SL55 |
