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Phone Nokia Lumia 521 / 520 Motorola Moto z4 Sony Ericsson K850 Asus ROG Phone II Nokia 6500 classic
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Not yet released Released
Specifications 
Display Size 4" diag.
5 : 3
6.4" diag.
19.5 : 9
2.2" diag.
4 : 3
6.6" diag.
19.5 : 9
2" diag.
4 : 3
Display Resolution & Type 480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
1080 x 2340 pixels
(~403 ppi)
AMOLED
240 x 320 pixels
(~182 ppi)
LCD (TFT/TFD)
1080 x 2340 pixels
(~391 ppi)
AMOLED
240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz ? 120 Hz ?
Battery 1,430 mAh 3,600 mAh ? 6,000 mAh 830 mAh
Processor 1 GHz Qualcomm Snapdragon S4 MSM8270 2 GHz Qualcomm Snapdragon 675 ? 3 GHz Qualcomm Snapdragon 855 Plus ?
RAM 512 MB 4 GB ? 12 GB ?
Storage 8 GB 128 GB ? raw hardware 512 GB ? raw hardware
Main Camera 5 megapixel 48 megapixel 5 megapixel 48 megapixel 2 megapixel
Wide Camera - - - 13 megapixel -
Tele Camera - - - - -
Video Capture 720p HD 4K UHD ? 4K UHD QCIF (176 x 144)
Front Camera - 25 megapixel - 24 megapixel -
Weight 4.39 oz
(124g)
6 oz
(170g)
4.2 oz
(119g)
8.47 oz
(240g)
3.32 oz
(94g)
Dimensions 4.72" x 2.52" x 0.39"
(120 x 64 x 9.9 mm)
6.22" x 2.96" x 0.29"
(158 x 75 x 7.4 mm)
4" x 1.9" x 0.7"
(102 x 48 x 17.8 mm)
6.73" x 3.06" x 0.37"
(171 x 78 x 9.5 mm)
4.32" x 1.77" x 0.37"
(110 x 45 x 9.4 mm)
Form Factor Slab Slab Slab Slab Slab
Platform / OS Windows Android (proprietary) Android (proprietary)
Network Bands

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

4G LTE: 2, 3, 4, 5, 7, 12, 13, 20, 25, 26, 28, 29, 30, 38, 41, 66, 71

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 18, 19, 20, 26, 28, 29, 32, 34, 38, 39, 40, 41, 46, 66

WCDMA: 1, 2, 3, 4, 5, 8, 19

GSM: 850, 900, 1800, 1900

WCDMA: 1, 5

GSM: 850, 900, 1800, 1900

*

Data Technology HSPA+ 21 LTE (Cat 12) HSDPA 3.6 LTE (Cat 20) EDGE
Features 
Fingerprint Reader - Yes - Yes
in-display (optical)
-
Flashlight - Yes - Yes -
GPS / Location n/a n/a - n/a -
Water-Resistant - Yes - - -
Accessibility
Hearing Aid Compatible Yes Yes - Yes -
Multiple Languages n/a n/a Yes n/a Yes
TTY/TDD (Digital) Yes Yes Yes - -
Alerts
Ringer Profiles - - Yes - Yes
Connectivity
Bluetooth Yes Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Mobile Hotspot n/a n/a - n/a -
NFC - Yes - Yes -
USB Yes Yes
USB Type C
Yes Yes
USB Type C
Yes
Micro-USB
Wi-Fi Yes Yes
5 (802.11 a,ac,b,g,n)
- Yes
5 (802.11 a,ac,b,g,n)
-
Contacts
Picture ID n/a n/a Yes n/a Yes
Ringer ID n/a n/a Yes n/a Yes
Voice Dialing n/a n/a Yes n/a Yes
Customization
Custom Graphics n/a n/a Yes n/a Yes
Custom Ringtones n/a n/a Yes n/a Yes
Real-Music Ringers n/a n/a Yes n/a Yes
Data & Network
Data Tethering n/a n/a Yes n/a Yes
Dual-SIM - - - Yes -
WAP / Web Browser n/a n/a Yes n/a Yes
Input
Predictive Text Entry n/a n/a Yes n/a Yes
Side Keys Yes Yes Yes Yes -
Touch Screen Yes Yes - Yes -
Memory
Memory Card Slot Yes Yes Yes - -
Messaging
Email Client n/a n/a Yes n/a Yes
Instant Messaging n/a n/a - n/a -
MMS n/a n/a Yes n/a Yes
Text Messaging Templates n/a n/a Yes n/a Yes
Music
FM Radio - Yes Yes Yes -
Headphone Jack (3.5mm) Yes Yes - Yes -
Music Player n/a n/a Yes n/a Yes
Stereo Speakers - - - Yes -
Photo & Video
TV Output - - - Yes -
Video Calling n/a n/a Yes * n/a -
Power
Fast Charging - Yes - Yes -
Productivity
Alarm n/a n/a Yes n/a Yes
Calculator n/a n/a Yes n/a Yes
Calendar n/a n/a Yes n/a Yes
To-Do List n/a n/a Yes n/a Yes
Voice Memo n/a n/a Yes n/a Yes
Software
Games n/a n/a Yes n/a Yes
Java (J2ME) n/a n/a Yes n/a Yes
Voice
HD Voice - Yes - - -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Nokia Lumia 521 / 520 Motorola Moto z4 Sony Ericsson K850 Asus ROG Phone II Nokia 6500 classic
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Phone Nokia Lumia 521 / 520 Motorola Moto z4 Sony Ericsson K850 Asus ROG Phone II Nokia 6500 classic

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