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Phone ZTE Z998 / Unico LTE Samsung Glyde U940 Samsung Galaxy S21 Sony Xperia Z3 Compact
Current U.S. Carriers (none) (none) Verizon (none)
Global Availability Released Released Released Released
Specifications 
Display Size 4.5" diag.
16 : 9
2.8" diag.
16.5 : 9
6.2" diag.
20 : 9
4.6" diag.
16 : 9
Display Resolution & Type 540 x 960 pixels
(~245 ppi)
LCD (TFT/TFD)
240 x 440 pixels
(~182 ppi)
LCD (TFT/TFD)
1080 x 2400 pixels
(~424 ppi)
AMOLED
720 x 1280 pixels
(~319 ppi)
LCD (TFT/TFD)
Display Refresh 60 Hz ? 120 Hz 60 Hz
Battery 2,070 mAh 1,000 mAh 4,000 mAh 2,600 mAh
Processor 1.2 GHz Qualcomm Snapdragon 400 MSM8930 ? 2.8 GHz Qualcomm Snapdragon 888 2.5 GHz Qualcomm Snapdragon 801 (MSM8974AC)
RAM 1 GB ? 8 GB 2 GB
Storage 4 GB ? raw hardware 128 GB * 16 GB
Main Camera 5 megapixel 2 megapixel 12 megapixel 20 megapixel
Wide Camera - - 12 megapixel -
Tele Camera - - 64 megapixel -
Video Capture 720p HD QVGA (320 x 240) 8K 4K UHD
Front Camera 1 megapixel - 10 megapixel 2 megapixel
Weight 4.8 oz
(136g)
4.2 oz
(119g)
6.03 oz
(171g)
4.55 oz
(129g)
Dimensions 5.2" x 2.6" x 0.4"
(132 x 66 x 10.2 mm)
4.09" x 1.98" x 0.71"
(104 x 50 x 18 mm)
5.97" x 2.8" x 0.31"
(152 x 71 x 7.9 mm)
5" x 2.56" x 0.34"
(127 x 65 x 8.6 mm)
Form Factor Slab Slide Slab Slab
Platform / OS Android (proprietary) Android Android
Network Bands

4G LTE: 2, 4, 5, 17

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

CDMA: 850, 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

4G LTE: 1, 2, 3, 4, 5, 7, 8, 13, 17

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

Data Technology LTE (Cat 3) EVDO r0 NR (5G) LTE (Cat 4)
Features 
Barometer - - Yes -
Fingerprint Reader - - Yes
in-display (ultrasonic)
-
Flashlight - - Yes -
GPS / Location n/a Yes n/a n/a
Ruggedized - - - Yes
Water-Resistant - - Yes
IPX8 (SCUBA)
Yes
IPX8 (SCUBA)
Accessibility
Adjustable Text Size n/a - n/a n/a
Hearing Aid Compatible Yes
M3, T4 (very tele-coil compatible)
Yes
M4 (very 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
Mobile Hotspot n/a - n/a n/a
NFC - - Yes Yes
USB Yes
Micro-USB
Yes Yes
USB Type C
Yes
Micro-USB
Wi-Fi Yes
4 (802.11 b,g,n)
- Yes
6 (802.11 a,ac,ax,b,g,n)
Yes
5 (802.11 a,ac,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 Yes 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
Text Keyboard, Hardware - Yes - -
Touch Screen Yes
Capacitive
Yes Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot Yes Yes - Yes
Messaging
Email Client n/a - n/a n/a
Instant Messaging n/a - n/a n/a
MMS n/a Yes n/a n/a
Text Messaging Templates n/a Yes n/a n/a
Music
FM Radio - - - Yes
Headphone Jack (3.5mm) Yes - - Yes
Music Player n/a Yes n/a n/a
Stereo Speakers - - Yes Yes
Photo & Video
DLNA - - - Yes
Miracast - - - Yes
TV Output - - Yes Yes
Power
Fast Charging - - Yes 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
Voice Memo n/a - n/a n/a
Software
BREW n/a Yes n/a n/a
Games n/a Yes n/a n/a
Voice
Call Screening - - - Yes
HD Voice - - Yes -
Headset Jack (2.5 mm) n/a Yes n/a n/a
Speaker Phone Yes Yes Yes Yes
  * Some versions only
  ZTE Z998 / Unico LTE Samsung Glyde U940 Samsung Galaxy S21 Sony Xperia Z3 Compact
  X > < X > < X > < X

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

 
Phone ZTE Z998 / Unico LTE Samsung Glyde U940 Samsung Galaxy S21 Sony Xperia Z3 Compact

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