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| Phone | Nokia Lumia 521 / 520 | Samsung SGH-A657 | Samsung Galaxy S6 (GSM) | ZTE Speed |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
4" diag. 5 : 3 |
? |
5.1" diag. 16 : 9 |
4.5" diag. 16 : 9 |
| Display Resolution & Type |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
176 x 220 pixels LCD (TFT/TFD) |
1440 x 2560 pixels (~576 ppi) AMOLED |
540 x 960 pixels (~245 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | 60 Hz | 60 Hz |
| Battery | 1,430 mAh | 1,420 mAh | 2,550 mAh | 2,000 mAh |
| Processor | 1 GHz Qualcomm Snapdragon S4 MSM8270 | ? | 2.1 GHz Samsung Exynos 7420 | 1.2 GHz Qualcomm Snapdragon 410 MSM8916 |
| RAM | 512 MB | ? | 3 GB | 1 GB |
| Storage | 8 GB | ? raw hardware | 32 GB * | 8 GB |
| Main Camera | 5 megapixel | - | 16 megapixel | 5 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | 720p HD | - | 4K UHD | 720p HD |
| Front Camera | - | - | 5 megapixel | 2 megapixel |
| Weight |
4.39 oz (124g) |
4.34 oz (123g) |
4.87 oz (138g) |
4.8 oz (136g) |
| Dimensions |
4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm) |
4.53" x 2.05" x 0.77" (115 x 52 x 19.6 mm) |
5.65" x 2.78" x 0.27" (143 x 71 x 6.8 mm) |
5.3" x 2.6" x 0.4" (135 x 66 x 10.2 mm) |
| Form Factor | Slab | Slab | Slab | Slab |
| Platform / OS | Windows | (proprietary) | Android | Android |
| Network Bands |
WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 |
4G LTE: 25, 26, 41 CDMA: 800, 850, 1900 |
||
| Data Technology | HSPA+ 21 | HSDPA 3.6 | LTE (Cat 6) | LTE (Cat 3) |
| Features | ||||
| Fingerprint Reader | - | - | Yes | - |
| Flashlight | - | Yes | Yes | - |
| GPS / Location | n/a | Yes | n/a | n/a |
| Ruggedized | - | Yes | - | - |
| VR-ready | - | - | Yes | - |
| Accessibility | ||||
| Adjustable Text Size | n/a | - | n/a | n/a |
| Hearing Aid Compatible |
Yes M3, T4 (very tele-coil compatible) |
- |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M3, T4 (very tele-coil compatible) |
| Multiple Languages | n/a | Yes | n/a | n/a |
| TTY/TDD (Digital) | Yes | Yes | Yes | Yes |
| Connectivity | ||||
| Bluetooth | Yes | Yes | Yes | Yes |
| Infrared (IR) | - | - | Yes | - |
| MirrorLink | - | - | Yes | - |
| Mobile Hotspot | n/a | - | n/a | n/a |
| NFC | - | - | Yes | - |
| USB | Yes | Yes |
Yes Micro-USB |
Yes Micro-USB |
| Wi-Fi | Yes | - |
Yes 5 (802.11 a,ac,b,g,n) |
Yes 4 (802.11 b,g,n) |
| Contacts | ||||
| Picture ID | n/a | Yes | n/a | n/a |
| Ringer ID | n/a | Yes | n/a | n/a |
| Voice Dialing | n/a | - | n/a | n/a |
| Customization | ||||
| Custom Graphics | n/a | Yes | n/a | n/a |
| Custom Ringtones | n/a | Yes | n/a | n/a |
| Real-Music Ringers | n/a | Yes | n/a | n/a |
| Data & Network | ||||
| Data Tethering | n/a | Yes | n/a | n/a |
| WAP / Web Browser | n/a | Yes | n/a | n/a |
| Input | ||||
| Predictive Text Entry | n/a | Yes | n/a | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen |
Yes Capacitive |
- |
Yes Capacitive |
Yes Capacitive |
| Memory | ||||
| Memory Card Slot | Yes | Yes | - | Yes |
| Messaging | ||||
| Email Client | n/a | Yes | n/a | n/a |
| Instant Messaging | n/a | Yes | n/a | n/a |
| MMS | n/a | Yes | n/a | n/a |
| Text Messaging Templates | n/a | Yes | n/a | n/a |
| Music | ||||
| Headphone Jack (3.5mm) | Yes | - | Yes | Yes |
| Music Player | n/a | Yes | n/a | n/a |
| Photo & Video | ||||
| DLNA | - | - | Yes | - |
| Miracast | - | - | Yes | - |
| TV Output | - | - | Yes | - |
| Power | ||||
| Fast Charging | - | - | Yes | - |
| Wireless Charging | - | - | Yes | - |
| Productivity | ||||
| Alarm | n/a | Yes | n/a | n/a |
| Calculator | n/a | Yes | n/a | n/a |
| Calendar | n/a | Yes | n/a | n/a |
| To-Do List | n/a | Yes | n/a | n/a |
| Voice Memo | n/a | Yes | n/a | n/a |
| Software | ||||
| Games | n/a | Yes | n/a | n/a |
| Java (J2ME) | n/a | Yes | n/a | n/a |
| Voice | ||||
| HD Voice | - | - | Yes | Yes |
| Push-To-Talk | - | Yes | - | - |
| Speaker Phone | Yes | Yes | Yes | Yes |
| Nokia Lumia 521 / 520 | Samsung SGH-A657 | Samsung Galaxy S6 (GSM) | ZTE Speed | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Nokia Lumia 521 / 520 | Samsung SGH-A657 | Samsung Galaxy S6 (GSM) | ZTE Speed |
