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Phone Apple iPhone X Sony Xperia Z Ultra Samsung Galaxy S21
Current U.S. Carriers (none) (none) Verizon
Global Availability Released Not yet released Released
Specifications 
Display Size 5.8" diag.
19.5 : 9
6.4" diag.
16 : 9
6.2" diag.
20 : 9
Display Resolution & Type 1125 x 2436 pixels
(~463 ppi)
AMOLED
1080 x 1920 pixels
(~344 ppi)
LCD (TFT/TFD)
1080 x 2400 pixels
(~424 ppi)
AMOLED
Display Refresh 60 Hz 60 Hz 120 Hz
Battery 2,716 mAh 3,050 mAh 4,000 mAh
Processor Apple A11 2.2 GHz Qualcomm Snapdragon 800 MSM8974 2.8 GHz Qualcomm Snapdragon 888
RAM 3 GB 2 GB 8 GB
Storage 64 GB * 16 GB 128 GB *
Main Camera 12 megapixel 8 megapixel 12 megapixel
Wide Camera - - 12 megapixel
Tele Camera Yes - 64 megapixel
Video Capture 4K UHD 1080p HD 8K
Front Camera 7 megapixel 2 megapixel 10 megapixel
Weight 6.14 oz
(174g)
7.48 oz
(212g)
6.03 oz
(171g)
Dimensions 5.65" x 2.79" x 0.3"
(144 x 71 x 7.6 mm)
7.06" x 3.63" x 0.26"
(179 x 92 x 6.5 mm)
5.97" x 2.8" x 0.31"
(152 x 71 x 7.9 mm)
Platform / OS iOS Android Android
Network Bands

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 34, 38, 39, 40, 41, 66

WCDMA: 1, 2, 4, 5, 8

CDMA: 850, 1900

GSM: 850, 900, 1800, 1900

*

4G LTE: 1, 2, 3, 4, 5, 7, 8

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

*

5G: 2, 5, 12, 25, 30, 41, 66, 71, 77-C, 260, 261

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 48, 66, 71

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

Data Technology LTE (Cat 9) LTE (Cat 4) NR (5G)
Features 
Barometer Yes - Yes
Fingerprint Reader - - Yes
in-display (ultrasonic)
Flashlight Yes - Yes
Ruggedized - Yes -
Water-Resistant Yes
IPX7 (snorkeling)
Yes Yes
IPX8 (SCUBA)
Accessibility
Hearing Aid Compatible Yes Yes Yes
TTY/TDD (Digital) Yes - Yes
Connectivity
Bluetooth Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
MirrorLink - Yes -
NFC Yes Yes Yes
USB Yes Yes
Micro-USB
Yes
USB Type C
Wi-Fi Yes
5 (802.11 a,ac,b,g,n)
Yes Yes
6 (802.11 a,ac,ax,b,g,n)
Input
Side Keys Yes Yes Yes
Touch Screen Yes Yes Yes
Memory
Memory Card Slot - Yes -
Music
FM Radio - Yes -
Headphone Jack (3.5mm) - Yes -
Stereo Speakers Yes - Yes
Photo & Video
DLNA - Yes -
Miracast - Yes -
TV Output Yes Yes Yes
Power
Fast Charging Yes - Yes
Wireless Charging Yes - Yes
Voice
HD Voice Yes - Yes
Speaker Phone Yes Yes Yes
  Apple iPhone X Sony Xperia Z Ultra Samsung Galaxy S21
  X > < X > < X

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

 
Phone Apple iPhone X Sony Xperia Z Ultra Samsung Galaxy S21

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