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| Phone | Nokia Lumia 521 / 520 | Siemens M75 | AT&T Maestro 3 |
| Current U.S. Carriers | (none) | (none) | (none) |
| Global Availability | Released | Not yet released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size |
4" diag. 5 : 3 |
? |
6.5" diag. 20 : 9 |
| Display Resolution & Type |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
132 x 176 pixels LCD (TFT/TFD) |
720 x 1600 pixels (~270 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | 60 Hz |
| Battery | 1,430 mAh | 750 mAh | 3,900 mAh |
| Processor | 1 GHz Qualcomm Snapdragon S4 MSM8270 | ? | 2 GHz MediaTek Helio A22 (MT6761) |
| RAM | 512 MB | ? | 3 GB |
| Storage | 8 GB | ? raw hardware | 32 GB |
| Main Camera | 5 megapixel | 1 megapixel | 13 megapixel |
| Wide Camera | - | - | 5 megapixel |
| Tele Camera | - | - | - |
| Video Capture | 720p HD | ? | 1080p HD |
| Front Camera | - | - | 5 megapixel |
| Weight |
4.39 oz (124g) |
3.88 oz (110g) |
6.24 oz (177g) |
| Dimensions |
4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm) |
4.35" x 2.03" x 0.82" (110 x 52 x 20.8 mm) |
6.58" x 3.03" x 0.33" (167 x 77 x 8.4 mm) |
| Form Factor | Slab | Slab | Slab |
| Platform / OS | Windows | (proprietary) | Android |
| Network Bands |
GSM: 900, 1800, 1900 |
4G LTE: 2, 4, 5, 12, 14, 30 |
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| Data Technology | HSPA+ 21 | GPRS | LTE (Cat 4) |
| Features | |||
| Barometer | - | - | Yes |
| Fingerprint Reader | - | - |
Yes stand-alone |
| Flashlight | - | - | Yes |
| GPS / Location | n/a | - | n/a |
| Ruggedized | - | Yes | - |
| Accessibility | |||
| Hearing Aid Compatible |
Yes M3, T4 (very tele-coil compatible) |
- |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | n/a | Yes | n/a |
| TTY/TDD (Digital) | Yes | - | - |
| Alerts | |||
| Ringer Profiles | - | Yes | - |
| Connectivity | |||
| Bluetooth | Yes | Yes | Yes |
| Infrared (IR) | - | Yes | - |
| Mobile Hotspot | n/a | - | n/a |
| USB | Yes | Yes |
Yes USB Type C |
| Wi-Fi | Yes | - |
Yes 5 (802.11 a,ac,b,g,n) |
| Contacts | |||
| Picture ID | n/a | Yes | n/a |
| Ringer ID | n/a | Yes | n/a |
| Voice Dialing | n/a | - | n/a |
| Customization | |||
| Custom Graphics | n/a | Yes | n/a |
| Custom Ringtones | n/a | Yes | n/a |
| Real-Music Ringers | n/a | - | n/a |
| Data & Network | |||
| Data Tethering | n/a | Yes | n/a |
| WAP / Web Browser | n/a | Yes | n/a |
| Input | |||
| Predictive Text Entry | n/a | Yes | n/a |
| Side Keys | Yes | Yes | Yes |
| Touch Screen |
Yes Capacitive |
- |
Yes Capacitive |
| Memory | |||
| Memory Card Slot | Yes | Yes | Yes |
| Messaging | |||
| Email Client | n/a | Yes | n/a |
| EMS / Picture Messaging | n/a | Yes | n/a |
| Instant Messaging | n/a | - | n/a |
| MMS | n/a | Yes | n/a |
| Music | |||
| Headphone Jack (3.5mm) | Yes | - | Yes |
| Music Player | n/a | Yes | n/a |
| Productivity | |||
| Alarm | n/a | Yes | n/a |
| Calculator | n/a | Yes | n/a |
| Calendar | n/a | Yes | n/a |
| To-Do List | n/a | Yes | n/a |
| Voice Memo | n/a | Yes | n/a |
| Software | |||
| Games | n/a | Yes | n/a |
| Java (J2ME) | n/a | Yes | n/a |
| Voice | |||
| HD Voice | - | - | Yes |
| Push-To-Talk | - | Yes | - |
| Speaker Phone | Yes | Yes | Yes |
| Nokia Lumia 521 / 520 | Siemens M75 | AT&T Maestro 3 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Nokia Lumia 521 / 520 | Siemens M75 | AT&T Maestro 3 |
