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Phone Samsung SPH-Z400 LG VX-3200 Samsung SPH-N400 Samsung Galaxy S21 LG K20 / Harmony / Grace
Current U.S. Carriers (none) (none) (none) Verizon (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 1.9" diag.
4 : 3
? ? 6.2" diag.
20 : 9
5.3" diag.
16 : 9
Display Resolution & Type 176 x 220 pixels
(~150 ppi)
LCD (TFT/TFD)
128 x 128 pixels
LCD (STN)
128 x 128 pixels
LCD (STN)
1080 x 2400 pixels
(~424 ppi)
AMOLED
720 x 1280 pixels
(~277 ppi)
LCD (TFT/TFD)
Display Refresh ? ? ? 120 Hz 60 Hz
Battery 1,300 mAh 1,000 mAh ? 4,000 mAh 2,800 mAh
Processor ? ? ? 2.8 GHz Qualcomm Snapdragon 888 1.4 GHz Qualcomm Snapdragon 425 (MSM8917)
RAM ? ? ? 8 GB 1.5 GB
Storage ? raw hardware ? raw hardware ? raw hardware 128 GB * 16 GB
Main Camera 1 megapixel - - 12 megapixel 8 megapixel
Wide Camera - - - 12 megapixel -
Tele Camera - - - 64 megapixel -
Video Capture QCIF (176 x 144) - - 8K 1080p HD
Front Camera - - - 10 megapixel 5 megapixel
Weight 4.06 oz
(115g)
3.53 oz
(100g)
4 oz
(113g)
6.03 oz
(171g)
5 oz
(142g)
Dimensions 3.73" x 1.91" x 1"
(95 x 49 x 25.4 mm)
3.35" x 1.81" x 0.92"
(85 x 46 x 23.4 mm)
4.25" x 2.04" x 0.82"
(108 x 52 x 20.8 mm)
5.97" x 2.8" x 0.31"
(152 x 71 x 7.9 mm)
5.9" x 3" x 0.3"
(150 x 76 x 7.6 mm)
Form Factor Clamshell Clamshell Flip Slab Slab
Platform / OS (proprietary) (proprietary) (proprietary) Android Android
Network Bands

CDMA: 850, 1900

CDMA: 850, 1900

AMPS: 850

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: 2, 4, 5, 12

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

Data Technology EVDO rA 1xRTT 1xRTT NR (5G) LTE (Cat 4)
Features 
Barometer - - - Yes -
Fingerprint Reader - - - Yes
in-display (ultrasonic)
-
Flashlight - - - Yes Yes
GPS / Location Yes Yes Yes n/a n/a
Ruggedized Yes - - - -
Water-Resistant - - - Yes
IPX8 (SCUBA)
-
Accessibility
Adjustable Text Size Yes - - n/a n/a
Hearing Aid Compatible Yes
M4 (very compatible)
- - Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages Yes Yes Yes n/a n/a
TTY/TDD (Digital) Yes Yes Yes Yes Yes
Alerts
Extra Display Yes - - - -
Connectivity
Bluetooth Yes - - Yes Yes
NFC - - - Yes Yes *
USB Yes Yes Yes Yes
USB Type C
Yes
Micro-USB
Wi-Fi - - - Yes
6 (802.11 a,ac,ax,b,g,n)
Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes - Yes n/a n/a
Ringer ID Yes Yes Yes n/a n/a
Voice Dialing Yes Yes Yes n/a n/a
Customization
Custom Graphics Yes Yes Yes n/a n/a
Custom Ringtones Yes - Yes n/a n/a
Real-Music Ringers Yes - - n/a n/a
Data & Network
Data Tethering Yes Yes Yes n/a n/a
WAP / Web Browser Yes - Yes n/a n/a
Input
Predictive Text Entry Yes Yes Yes n/a n/a
Side Keys Yes Yes Yes Yes Yes
Touch Screen - - - Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot - - - - Yes
Messaging
Email Client Yes - - n/a n/a
EMS / Picture Messaging - Yes - n/a n/a
Text Messaging Templates Yes Yes - n/a n/a
Music
FM Radio - - - - Yes
Headphone Jack (3.5mm) - - - - Yes
Stereo Speakers Yes - - Yes -
Photo & Video
TV Output - - - Yes -
Power
Fast Charging - - - Yes -
Wireless Charging - - - Yes -
Productivity
Alarm Yes Yes Yes n/a n/a
Calculator Yes Yes Yes n/a n/a
Calendar Yes Yes Yes n/a n/a
To-Do List - - Yes n/a n/a
Voice Memo Yes Yes - n/a n/a
Software
Games Yes - Yes n/a n/a
Java (J2ME) Yes - Yes n/a n/a
Voice
Call Screening - Yes - - -
HD Voice - - - Yes Yes
Headset Jack (2.5 mm) Yes Yes Yes n/a n/a
Push-To-Talk Yes - - - -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Samsung SPH-Z400 LG VX-3200 Samsung SPH-N400 Samsung Galaxy S21 LG K20 / Harmony / Grace
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung SPH-Z400 LG VX-3200 Samsung SPH-N400 Samsung Galaxy S21 LG K20 / Harmony / Grace

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