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Phone Sony Xperia Z3 Samsung Galaxy A71 5G ZTE Z221 Samsung Knack U310
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 5.2" diag.
16 : 9
6.7" diag.
20 : 9
2" diag.
4 : 3
2.2" diag.
4 : 3
Display Resolution & Type 1080 x 1920 pixels
(~424 ppi)
LCD (TFT/TFD)
1080 x 2400 pixels
(~393 ppi)
AMOLED
240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
176 x 220 pixels
(~128 ppi)
LCD (TFT/TFD)
Display Refresh 60 Hz 60 Hz ? ?
Battery 3,100 mAh 4,500 mAh 900 mAh 1,000 mAh
Processor 2.5 GHz Qualcomm Snapdragon 801 (MSM8974AC) 2.4 GHz Qualcomm Snapdragon 765 ? ?
RAM 3 GB 6 GB ? ?
Storage 16 GB 128 GB 142 MB ? raw hardware
Main Camera 20 megapixel 64 megapixel Yes -
Wide Camera - 12 megapixel - -
Tele Camera - - - -
Video Capture 4K UHD 4K UHD QCIF (176 x 144) -
Front Camera 2 megapixel 32 megapixel - -
Weight 5.36 oz
(152g)
6.52 oz
(185g)
3.24 oz
(92g)
3.63 oz
(103g)
Dimensions 5.75" x 2.83" x 0.29"
(146 x 72 x 7.3 mm)
6.39" x 2.97" x 0.31"
(162 x 75 x 7.9 mm)
3.76" x 1.92" x 0.73"
(96 x 49 x 18.5 mm)
3.78" x 2.01" x 0.74"
(96 x 51 x 18.8 mm)
Form Factor Slab Slab Clamshell Clamshell
Platform / OS Android Android (proprietary) (proprietary)
Network Bands

4G LTE: 2, 4, 12

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

5G: 2, 5, 41, 66, 71, 260, 261

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

WCDMA: 1, 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

Data Technology LTE (Cat 4) NR (5G) HSDPA 3.6 -
Features 
Fingerprint Reader - Yes
in-display (optical)
- -
Flashlight - Yes - -
GPS / Location n/a n/a Yes Yes
Ruggedized Yes - - -
Water-Resistant Yes
IPX8 (SCUBA)
- - -
Accessibility
Adjustable Text Size n/a n/a - Yes
Hearing Aid Compatible Yes Yes Yes Yes
Multiple Languages n/a n/a Yes Yes
TTY/TDD (Digital) Yes Yes Yes Yes
Alerts
Extra Display - - Yes Yes
Ringer Profiles - - Yes -
Connectivity
Bluetooth Yes Yes Yes -
Mobile Hotspot n/a n/a - -
NFC Yes Yes - -
USB Yes
Micro-USB
Yes
USB Type C
Yes -
Wi-Fi Yes Yes
5 (802.11 a,ac,b,g,n)
- -
Contacts
Picture ID n/a n/a - -
Ringer ID n/a n/a - -
Voice Dialing n/a n/a - Yes
Customization
Custom Graphics n/a n/a Yes -
Custom Ringtones n/a n/a Yes -
Real-Music Ringers n/a n/a Yes -
Data & Network
Data Tethering n/a n/a - -
WAP / Web Browser n/a n/a Yes -
Input
Predictive Text Entry n/a n/a Yes Yes
Side Keys Yes Yes Yes Yes
Touch Screen Yes Yes - -
Memory
Memory Card Slot Yes Yes - -
Messaging
Email Client n/a n/a Yes -
EMS / Picture Messaging n/a n/a - Yes
Instant Messaging n/a n/a Yes -
MMS n/a n/a Yes -
Text Messaging Templates n/a n/a Yes -
Music
FM Radio Yes - - -
Headphone Jack (3.5mm) Yes Yes - -
Music Player n/a n/a - -
Stereo Speakers Yes - - -
Photo & Video
DLNA Yes - - -
Miracast Yes - - -
TV Output Yes - - -
Power
Fast Charging Yes Yes - -
Productivity
Alarm n/a n/a Yes Yes
Calculator n/a n/a Yes Yes
Calendar n/a n/a Yes Yes
Voice Memo n/a n/a Yes -
Software
Games n/a n/a Yes -
Java (J2ME) n/a n/a Yes -
Voice
HD Voice Yes Yes - -
Headset Jack (2.5 mm) n/a n/a - Yes
Speaker Phone Yes Yes Yes Yes
  Sony Xperia Z3 Samsung Galaxy A71 5G ZTE Z221 Samsung Knack U310
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Sony Xperia Z3 Samsung Galaxy A71 5G ZTE Z221 Samsung Knack U310

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