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| Phone | Ericsson T28 World | Nokia Lumia 521 / 520 | ZTE Flash | Apple iPhone 4 (GSM) | Samsung SGH-E900 / E906 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released | Released |
| Specifications | |||||
|---|---|---|---|---|---|
| Display Size | ? |
4" diag. 5 : 3 |
4.5" diag. 16 : 9 |
3.5" diag. 5 : 3 |
? |
| Display Resolution & Type | ? |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~326 ppi) LCD (TFT/TFD) |
640 x 960 pixels (~330 ppi) LCD (TFT/TFD) |
240 x 320 pixels LCD (TFT/TFD) |
| Display Refresh | ? | ? | 60 Hz | 60 Hz | ? |
| Battery | 500 mAh | 1,430 mAh | 1,780 mAh | ? | 800 mAh |
| Processor | ? | 1 GHz Qualcomm Snapdragon S4 MSM8270 | 1.5 GHz Qualcomm Snapdragon S4 Plus MSM8960 | Apple A4 | ? |
| RAM | ? | 512 MB | 1 GB | ? | ? |
| Storage | ? raw hardware | 8 GB | 8 GB | 32 GB * | ? raw hardware |
| Main Camera | - | 5 megapixel | 12 megapixel | 5 megapixel | 2 megapixel |
| Wide Camera | - | - | - | - | - |
| Tele Camera | - | - | - | - | - |
| Video Capture | - | 720p HD | 1080p HD | 720p HD | ? |
| Front Camera | - | - | 1 megapixel | Yes | - |
| Weight |
3.14 oz (89g) |
4.39 oz (124g) |
5.2 oz (147g) |
4.8 oz (136g) |
3.28 oz (93g) |
| Dimensions |
3.9" x 2" x 0.6" (99 x 51 x 15.2 mm) |
4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm) |
5.27" x 2.56" x 0.38" (134 x 65 x 9.7 mm) |
4.5" x 2.31" x 0.37" (114 x 59 x 9.4 mm) |
3.66" x 1.77" x 0.65" (93 x 45 x 16.5 mm) |
| Form Factor | Flip | Slab | Slab | Slab | Slide |
| Platform / OS | (proprietary) | Windows | Android | iOS | (proprietary) |
| Network Bands |
GSM: 900, 1900 |
4G LTE: 25 CDMA: 800, 850, 1900 |
WCDMA: 1, 2, 5, 8 GSM: 850, 900, 1800, 1900 |
GSM: 900, 1800, 1900 |
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| Data Technology | - | HSPA+ 21 | LTE (Cat 3) | HSPA 7.2 | EDGE |
| Features | |||||
| GPS / Location | - | n/a | n/a | n/a | - |
| Accessibility | |||||
| Adjustable Text Size | - | n/a | n/a | n/a | - |
| Hearing Aid Compatible | - | Yes | Yes | Yes | - |
| Multiple Languages | - | n/a | n/a | n/a | Yes |
| TTY/TDD (Digital) | - | Yes | Yes | Yes | - |
| Alerts | |||||
| Ringer Profiles | Yes | - | - | - | - |
| Connectivity | |||||
| Bluetooth |
- |
Yes |
Yes Classic Audio |
Yes Classic Audio |
Yes Classic Audio |
| Mobile Hotspot | - | n/a | n/a | n/a | - |
| NFC | - | - | Yes | - | - |
| USB | - | Yes |
Yes Micro-USB |
Yes | Yes |
| Wi-Fi | - | Yes |
Yes 4 (802.11 b,g,n) |
Yes 4 (802.11 b,g,n) |
- |
| Contacts | |||||
| Picture ID | - | n/a | n/a | n/a | Yes |
| Ringer ID | - | n/a | n/a | n/a | Yes |
| Voice Dialing | Yes | n/a | n/a | n/a | - |
| Customization | |||||
| Custom Graphics | - | n/a | n/a | n/a | Yes |
| Custom Ringtones | Yes | n/a | n/a | n/a | Yes |
| Real-Music Ringers | - | n/a | n/a | n/a | Yes |
| Data & Network | |||||
| Data Tethering | Yes | n/a | n/a | n/a | - |
| WAP / Web Browser | - | n/a | n/a | n/a | Yes |
| Input | |||||
| Predictive Text Entry | - | n/a | n/a | n/a | Yes |
| Side Keys | Yes | Yes | Yes | Yes | Yes |
| Touch Screen | - | Yes | Yes | Yes | - |
| Memory | |||||
| Memory Card Slot | - | Yes | Yes | - | Yes |
| Messaging | |||||
| Email Client | - | n/a | n/a | n/a | Yes |
| Instant Messaging | - | n/a | n/a | n/a | - |
| MMS | - | n/a | n/a | n/a | Yes |
| Text Messaging Templates | - | n/a | n/a | n/a | Yes |
| Music | |||||
| Headphone Jack (3.5mm) | - | Yes | Yes | Yes | - |
| Music Player | - | n/a | n/a | n/a | Yes |
| Photo & Video | |||||
| TV Output | - | - | - | Yes | Yes |
| Productivity | |||||
| Alarm | Yes | n/a | n/a | n/a | Yes |
| Calculator | Yes | n/a | n/a | n/a | Yes |
| Calendar | - | n/a | n/a | n/a | Yes |
| To-Do List | - | n/a | n/a | n/a | - |
| Voice Memo | - | n/a | n/a | n/a | Yes |
| Software | |||||
| Games | Yes | n/a | n/a | n/a | Yes |
| Java (J2ME) | - | n/a | n/a | n/a | Yes |
| Voice | |||||
| HD Voice | - | - | Yes | - | - |
| Speaker Phone | - | Yes | Yes | Yes | Yes |
| * Some versions only | |||||
| Ericsson T28 World | Nokia Lumia 521 / 520 | ZTE Flash | Apple iPhone 4 (GSM) | Samsung SGH-E900 / E906 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Ericsson T28 World | Nokia Lumia 521 / 520 | ZTE Flash | Apple iPhone 4 (GSM) | Samsung SGH-E900 / E906 |
