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Phone Samsung M400 AT&T Maestro 3 Google Pixel 3 XL Samsung SCH-A570
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 2.4" diag.
4 : 3
6.5" diag.
20 : 9
6.3" diag.
18.5 : 9
?
Display Resolution & Type 240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
720 x 1600 pixels
(~270 ppi)
LCD (TFT/TFD)
1440 x 2960 pixels
(~522 ppi)
AMOLED
128 x 160 pixels
LCD (STN)
Display Refresh ? 60 Hz 60 Hz ?
Battery 1,000 mAh 3,900 mAh 3,430 mAh ?
Processor 400 MHz Qualcomm QSC6155 2 GHz MediaTek Helio A22 (MT6761) 2.5 GHz Qualcomm Snapdragon 845 ?
RAM 128 MB 3 GB 4 GB ?
Storage 256 MB 32 GB 64 GB * ? raw hardware
Main Camera 1 megapixel 13 megapixel 12 megapixel -
Wide Camera - 5 megapixel - -
Tele Camera - - - -
Video Capture - 1080p HD 4K UHD -
Front Camera - 5 megapixel 8 megapixel -
Weight 3.7 oz
(105g)
6.24 oz
(177g)
6.49 oz
(184g)
3.6 oz
(102g)
Dimensions 3.8" x 1.9" x 0.7"
(97 x 48 x 17.8 mm)
6.58" x 3.03" x 0.33"
(167 x 77 x 8.4 mm)
6.22" x 3.02" x 0.31"
(158 x 77 x 7.9 mm)
3.3" x 1.8" x 0.9"
(84 x 46 x 22.9 mm)
Form Factor Clamshell Slab Slab Clamshell
Platform / OS (proprietary) Android Android (proprietary)
Network Bands

CDMA: 800, 850, 1900

4G LTE: 2, 4, 5, 12, 14, 30

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 38, 39, 40, 41, 42, 46, 66, 71

WCDMA: 1, 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

Data Technology 1xRTT LTE (Cat 4) LTE (Cat 16) 1xRTT
Features 
Barometer - Yes Yes -
Fingerprint Reader - Yes
stand-alone
Yes
stand-alone
-
Flashlight - Yes Yes -
GPS / Location Yes n/a n/a Yes
VR-ready - - Yes -
Water-Resistant - - Yes
IPX8 (SCUBA)
-
Accessibility
Adjustable Text Size Yes n/a n/a -
Hearing Aid Compatible Yes
M4, T4 (very tele-coil compatible)
Yes
M4, T4 (very tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
-
Multiple Languages Yes n/a n/a Yes
TTY/TDD (Digital) Yes - Yes Yes
Alerts
Extra Display Yes - - Yes
Connectivity
Bluetooth Yes Yes Yes -
NFC - - Yes -
USB Yes
Micro-USB
Yes
USB Type C
Yes
USB Type C
-
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 -
Ringer ID Yes n/a n/a -
Voice Dialing Yes n/a n/a Yes
Customization
Custom Graphics Yes n/a n/a Yes
Custom Ringtones Yes n/a n/a Yes
Real-Music Ringers Yes n/a n/a -
Data & Network
WAP / Web Browser Yes n/a n/a Yes
Input
Predictive Text Entry Yes n/a n/a Yes
Side Keys Yes Yes Yes Yes
Touch Screen - Yes
Capacitive
Yes
Capacitive
-
Memory
Memory Card Slot - Yes - -
Messaging
EMS / Picture Messaging - n/a n/a Yes
MMS Yes n/a n/a -
Text Messaging Templates Yes n/a n/a Yes
Music
Headphone Jack (3.5mm) Yes Yes - -
Stereo Speakers - - Yes -
Power
Fast Charging - - Yes -
Wireless Charging - - Yes -
Productivity
Alarm Yes n/a n/a Yes
Calculator Yes n/a n/a Yes
Calendar Yes n/a n/a Yes
To-Do List - n/a n/a Yes
Voice Memo Yes n/a n/a Yes
Software
BREW - n/a n/a Yes
Games Yes 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 -
  Samsung M400 AT&T Maestro 3 Google Pixel 3 XL Samsung SCH-A570
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Phone Samsung M400 AT&T Maestro 3 Google Pixel 3 XL Samsung SCH-A570

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