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Phone Asus ZenFone 4 AT&T Maestro 3 Motorola EM330 / EM28 Samsung SCH-A610
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 5.5" diag.
16 : 9
6.5" diag.
20 : 9
1.8" diag.
4 : 3
?
Display Resolution & Type 1080 x 1920 pixels
(~401 ppi)
LCD (TFT/TFD)
720 x 1600 pixels
(~270 ppi)
LCD (TFT/TFD)
128 x 160 pixels
(~114 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
Display Refresh 60 Hz 60 Hz ? ?
Battery 3,300 mAh 3,900 mAh 940 mAh 1,300 mAh
Processor 2.2 GHz Qualcomm Snapdragon 630 2 GHz MediaTek Helio A22 (MT6761) ? ?
RAM 4 GB 3 GB ? ?
Storage 64 GB 32 GB ? raw hardware ? raw hardware
Main Camera 12 megapixel 13 megapixel 1 megapixel Yes
Wide Camera Yes 5 megapixel - -
Tele Camera - - - -
Video Capture 4K UHD 1080p HD ? -
Front Camera 8 megapixel 5 megapixel - -
Weight 5.47 oz
(155g)
6.24 oz
(177g)
3.17 oz
(90g)
4.23 oz
(120g)
Dimensions 6.12" x 2.96" x 0.3"
(155 x 75 x 7.7 mm)
6.58" x 3.03" x 0.33"
(167 x 77 x 8.4 mm)
3.71" x 1.95" x 0.68"
(94 x 50 x 17.4 mm)
3.5" x 1.9" x 0.9"
(89 x 48 x 22.9 mm)
Form Factor Slab Slab Clamshell Clamshell
Platform / OS Android Android (proprietary) (proprietary)
Network Bands

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 17, 28

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

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

GSM: 850, 1800, 1900

*

CDMA: 850, 1900

Data Technology LTE (Cat 12) LTE (Cat 4) EDGE 1xRTT
Features 
Barometer - Yes - -
Fingerprint Reader Yes
stand-alone
Yes
stand-alone
- -
Flashlight Yes Yes - -
GPS / Location n/a n/a - Yes
Accessibility
Hearing Aid Compatible Yes Yes Yes -
Multiple Languages n/a n/a Yes Yes
TTY/TDD (Digital) - - Yes -
Alerts
Extra Display - - Yes -
Connectivity
Bluetooth Yes Yes Yes -
NFC Yes - - -
USB Yes
USB Type C
Yes
USB Type C
Yes
Mini-USB
-
Wi-Fi Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
- -
Contacts
Picture ID n/a n/a - Yes
Ringer ID n/a n/a - Yes
Voice Dialing n/a n/a - Yes
Customization
Custom Graphics n/a n/a Yes Yes
Custom Ringtones n/a n/a Yes Yes
Real-Music Ringers n/a n/a Yes -
Data & Network
Data Tethering n/a n/a - Yes
Dual-SIM Yes - - -
WAP / Web Browser n/a n/a Yes Yes
Input
Predictive Text Entry n/a n/a Yes Yes
Side Keys Yes Yes Yes Yes
Touch Screen Yes Yes - -
Memory
Memory Card Slot Yes Yes Yes -
Messaging
EMS / Picture Messaging n/a n/a Yes Yes
MMS n/a n/a Yes Yes
Text Messaging Templates n/a n/a Yes Yes
Music
FM Radio - - Yes -
Headphone Jack (3.5mm) Yes Yes Yes -
Music Player n/a n/a Yes -
Photo & Video
Miracast Yes - - -
Power
Fast Charging Yes - - -
Productivity
Alarm n/a n/a Yes Yes
Calculator n/a n/a Yes Yes
Calendar n/a n/a Yes Yes
To-Do List n/a n/a - Yes
Voice Memo n/a n/a - Yes
Software
BREW n/a n/a - Yes
Games n/a n/a Yes Yes
Java (J2ME) n/a n/a Yes -
Voice
HD Voice - Yes - -
Headset Jack (2.5 mm) n/a n/a - Yes
Speaker Phone Yes Yes Yes -
  Asus ZenFone 4 AT&T Maestro 3 Motorola EM330 / EM28 Samsung SCH-A610
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Phone Asus ZenFone 4 AT&T Maestro 3 Motorola EM330 / EM28 Samsung SCH-A610

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