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Phone ZTE Z998 / Unico LTE Motorola C290 Samsung Galaxy S21 Google Pixel 3a XL
Current U.S. Carriers (none) (none) Verizon (none)
Global Availability Released Released Released Released
Specifications 
Display Size 4.5" diag.
16 : 9
? 6.2" diag.
20 : 9
6" diag.
18 : 9
Display Resolution & Type 540 x 960 pixels
(~245 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (STN)
1080 x 2400 pixels
(~424 ppi)
AMOLED
1080 x 2160 pixels
(~402 ppi)
AMOLED
Display Refresh 60 Hz ? 120 Hz 60 Hz
Battery 2,070 mAh 1,020 mAh 4,000 mAh 3,700 mAh
Processor 1.2 GHz Qualcomm Snapdragon 400 MSM8930 ? 2.8 GHz Qualcomm Snapdragon 888 2 GHz Qualcomm Snapdragon 670
RAM 1 GB ? 8 GB 4 GB
Storage 4 GB ? raw hardware 128 GB * 64 GB
Main Camera 5 megapixel - 12 megapixel 12 megapixel
Wide Camera - - 12 megapixel -
Tele Camera - - 64 megapixel -
Video Capture 720p HD - 8K 4K UHD
Front Camera 1 megapixel - 10 megapixel 8 megapixel
Weight 4.8 oz
(136g)
3.53 oz
(100g)
6.03 oz
(171g)
5.89 oz
(167g)
Dimensions 5.2" x 2.6" x 0.4"
(132 x 66 x 10.2 mm)
3.43" x 1.91" x 0.93"
(87 x 49 x 23.6 mm)
5.97" x 2.8" x 0.31"
(152 x 71 x 7.9 mm)
6.3" x 3" x 0.3"
(160 x 76 x 7.6 mm)
Form Factor Slab Clamshell 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

AMPS: 850

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, 12, 13, 14, 17, 20, 25, 26, 28, 29, 30, 38, 40, 41, 66, 71

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

Data Technology LTE (Cat 3) 1xRTT NR (5G) LTE (Cat 11)
Features 
Barometer - - Yes Yes
Fingerprint Reader - - Yes
in-display (ultrasonic)
Yes
stand-alone
Flashlight - - Yes Yes
GPS / Location n/a Yes n/a n/a
Water-Resistant - - Yes
IPX8 (SCUBA)
-
Accessibility
Adjustable Text Size n/a - n/a n/a
Hearing Aid Compatible Yes
M3, T4 (very tele-coil compatible)
Yes
M3 (mostly compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages n/a Yes n/a n/a
TTY/TDD (Digital) Yes Yes Yes Yes
Connectivity
Bluetooth Yes - Yes Yes
Mobile Hotspot n/a - n/a n/a
NFC - - Yes Yes
USB Yes
Micro-USB
Yes
Mini-USB
Yes
USB Type C
Yes
USB Type C
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 - n/a n/a
Customization
Custom Graphics n/a - n/a n/a
Custom Ringtones n/a - n/a n/a
Real-Music Ringers n/a Yes n/a n/a
Data & Network
Data Tethering n/a - n/a n/a
External Antenna Jack 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
Touch Screen Yes
Capacitive
- Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot Yes - - -
Messaging
Email Client n/a - n/a n/a
Instant Messaging n/a - n/a n/a
MMS n/a - n/a n/a
Text Messaging Templates n/a Yes n/a n/a
Music
Headphone Jack (3.5mm) Yes - - Yes
Music Player n/a - n/a n/a
Stereo Speakers - - Yes Yes
Photo & Video
TV Output - - 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 Yes n/a n/a
Software
Games n/a Yes n/a n/a
Java (J2ME) n/a Yes n/a n/a
Voice
Call Screening - - - Yes
HD Voice - - Yes 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 Motorola C290 Samsung Galaxy S21 Google Pixel 3a XL
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone ZTE Z998 / Unico LTE Motorola C290 Samsung Galaxy S21 Google Pixel 3a XL

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