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Phone Nokia Lumia 521 / 520 Samsung SPH-I300 Microsoft Surface Duo 2
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size 4" diag.
5 : 3
? 8.3" diag.
4 : 3
Display Resolution & Type 480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
160 x 240 pixels
LCD (Color)
2688 x 1892 pixels
(~396 ppi)
AMOLED
Display Refresh ? ? 90 Hz
Battery 1,430 mAh ? 4,449 mAh
Processor 1 GHz Qualcomm Snapdragon S4 MSM8270 ? Qualcomm Snapdragon 888
RAM 512 MB ? 8 GB
Storage 8 GB ? raw hardware 128 GB *
Main Camera 5 megapixel - 12 megapixel
Wide Camera - - 16 megapixel
Tele Camera - - 12 megapixel
Video Capture 720p HD - 4K UHD
Front Camera - - 12 megapixel
Weight 4.39 oz
(124g)
6 oz
(170g)
10.02 oz
(284g)
Dimensions 4.72" x 2.52" x 0.39"
(120 x 64 x 9.9 mm)
4.9" x 2.28" x 0.82"
(124 x 58 x 20.8 mm)
5.72" x 3.63" x 0.43"
(145 x 92 x 11 mm)
Platform / OS Windows Palm OS Android
Network Bands

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

CDMA: 1900

AMPS: 850

5G: 1, 2, 3, 5, 7, 20, 25, 28, 38, 41, 66, 71, 77-C, 78, 257, 260, 261

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 48, 66, 71

WCDMA: 1, 2, 5, 8

GSM: 850, 900, 1800, 1900

Data Technology HSPA+ 21 - NR (5G)
Features 
Fingerprint Reader - - Yes
stand-alone
Flashlight - - Yes
Accessibility
Hearing Aid Compatible Yes - Yes
TTY/TDD (Digital) Yes - -
Alerts
Extra Display - Yes -
Connectivity
Bluetooth Yes - Yes
Infrared (IR) - Yes -
NFC - - Yes
USB Yes - Yes
USB Type C
Wi-Fi Yes - Yes
6 (802.11 a,ac,ax,b,g,n)
Data & Network
Dual-SIM - - Yes
Input
Side Keys Yes Yes Yes
Touch Screen Yes Yes Yes
Memory
Memory Card Slot Yes - -
Music
Headphone Jack (3.5mm) Yes - -
Stereo Speakers - - Yes
Photo & Video
Miracast - - Yes
TV Output - - Yes
Power
Fast Charging - - Yes
Voice
HD Voice - - Yes
Speaker Phone Yes Yes Yes
  Nokia Lumia 521 / 520 Samsung SPH-I300 Microsoft Surface Duo 2
  X > < X > < X

NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Nokia Lumia 521 / 520 Samsung SPH-I300 Microsoft Surface Duo 2

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