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Phone Samsung SGH-X820 Motorola moto g stylus (2021) Asus ROG Phone Samsung SCH-A990 Samsung SGH-A157
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? 6.8" diag.
20 : 9
6" diag.
18 : 9
? 1.8" diag.
4 : 3
Display Resolution & Type 220 x 176 pixels
LCD (TFT/TFD)
1080 x 2400 pixels
(~387 ppi)
LCD (TFT/TFD)
1080 x 2160 pixels
(~402 ppi)
AMOLED
240 x 320 pixels
LCD (TFT/TFD)
128 x 160 pixels
(~116 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 60 Hz ? ?
Battery 650 mAh 4,000 mAh 4,000 mAh 1,000 mAh 800 mAh
Processor ? Qualcomm Snapdragon 678 3 GHz Qualcomm Snapdragon 845 ? ?
RAM ? 4 GB 8 GB ? ?
Storage ? raw hardware 128 GB 128 GB * ? raw hardware 256 MB
Main Camera 2 megapixel 12 megapixel 12 megapixel 3 megapixel -
Wide Camera - 8 megapixel 8 megapixel - -
Tele Camera - - - - -
Video Capture ? 4K UHD 4K UHD ? -
Front Camera - 16 megapixel 8 megapixel - -
Weight 2.33 oz
(66g)
7.6 oz
(215g)
7.05 oz
(200g)
4.4 oz
(125g)
2.99 oz
(85g)
Dimensions 4.45" x 1.97" x 0.27"
(113 x 50 x 6.9 mm)
6.69" x 3.08" x 0.37"
(170 x 78 x 9.4 mm)
6.25" x 3" x 0.34"
(159 x 76 x 8.6 mm)
3.8" x 1.88" x 0.82"
(97 x 48 x 20.8 mm)
3.83" x 1.84" x 0.65"
(97 x 47 x 16.5 mm)
Form Factor Slab Slab Slab Clamshell Clamshell
Platform / OS (proprietary) Android Android (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 20, 25, 26, 29, 38, 40, 41, 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, 17, 18, 19, 20, 28, 29, 32, 34, 38, 39, 40, 41, 46

WCDMA: 1, 2, 3, 4, 5, 8, 19

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

Data Technology EDGE LTE (Cat 15) LTE (Cat 16) EVDO r0 ?
Features 
Barometer - Yes - - -
Fingerprint Reader - Yes
stand-alone
Yes - -
Flashlight - Yes Yes Yes -
GPS / Location - n/a n/a Yes Yes
Water-Resistant - Yes Yes - -
Accessibility
Adjustable Text Size - n/a n/a - Yes
Hearing Aid Compatible - Yes
M3, T3 (mostly tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Yes
M3 (mostly compatible)
Yes
M4 (very compatible)
Multiple Languages Yes n/a n/a Yes Yes
TTY/TDD (Digital) - Yes - Yes Yes
Alerts
Extra Display - - - Yes -
Ringer Profiles - - - - Yes
Connectivity
Bluetooth Yes Yes Yes Yes -
NFC - - Yes - -
USB Yes Yes
USB Type C
Yes
USB Type C
Yes Yes
Micro-USB
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
- -
Contacts
Picture ID Yes n/a n/a Yes Yes
Ringer ID Yes n/a n/a Yes Yes
Voice Dialing - n/a n/a Yes -
Customization
Custom Graphics Yes n/a n/a Yes Yes
Custom Ringtones Yes n/a n/a Yes Yes
Real-Music Ringers Yes n/a n/a Yes Yes
Data & Network
Data Tethering - n/a n/a Yes -
Dual-SIM - - Yes - -
External Antenna Jack Yes n/a n/a - -
WAP / Web Browser Yes n/a n/a Yes Yes
Input
Predictive Text Entry Yes n/a n/a Yes Yes
Side Keys Yes Yes Yes Yes -
Stylus - Yes - - -
Touch Screen - Yes
Capacitive
Yes
Capacitive
- -
Memory
Memory Card Slot - Yes - Yes -
Messaging
Email Client Yes n/a n/a - -
EMS / Picture Messaging Yes n/a n/a Yes -
MMS Yes n/a n/a Yes Yes
Text Messaging Templates Yes n/a n/a Yes Yes
Music
FM Radio - Yes Yes - -
Headphone Jack (3.5mm) - Yes Yes - -
Music Player - n/a n/a Yes -
Stereo Speakers - - Yes Yes -
Photo & Video
TV Output Yes - Yes Yes -
Power
Fast Charging - Yes Yes - -
Productivity
Alarm Yes n/a n/a Yes Yes
Calculator Yes n/a n/a Yes Yes
Calendar Yes n/a n/a Yes Yes
To-Do List Yes n/a n/a - Yes
Voice Memo Yes n/a n/a Yes Yes
Software
BREW - n/a n/a Yes -
Games Yes n/a n/a Yes -
Java (J2ME) Yes n/a n/a - -
Voice
HD Voice - Yes - - -
Speaker Phone Yes Yes Yes Yes Yes
  Samsung SGH-X820 Motorola moto g stylus (2021) Asus ROG Phone Samsung SCH-A990 Samsung SGH-A157
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung SGH-X820 Motorola moto g stylus (2021) Asus ROG Phone Samsung SCH-A990 Samsung SGH-A157

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