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Phone LG AX-490 Asus ROG Phone II ZTE ZMAX Pro ZTE Z221 Casio G'zOne Rock
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Not yet released Released Released Released
Specifications 
Display Size ? 6.6" diag.
19.5 : 9
6" diag.
16 : 9
2" diag.
4 : 3
2.1" diag.
4 : 3
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1080 x 2340 pixels
(~391 ppi)
AMOLED
1080 x 1920 pixels
(~367 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~190 ppi)
LCD (TFT/TFD)
Display Refresh ? 120 Hz 60 Hz ? ?
Battery 1,100 mAh 6,000 mAh 3,400 mAh 900 mAh 1,150 mAh
Processor ? 3 GHz Qualcomm Snapdragon 855 Plus 1.5 GHz Qualcomm Snapdragon 617 (MSM8952) ? ?
RAM ? 12 GB 2 GB ? ?
Storage ? raw hardware 512 GB 32 GB 142 MB ? raw hardware
Main Camera Yes 48 megapixel 13 megapixel Yes 2 megapixel
Wide Camera - 13 megapixel - - -
Tele Camera - - - - -
Video Capture - 4K UHD 1080p HD QCIF (176 x 144) ?
Front Camera - 24 megapixel 5 megapixel - -
Weight 3.79 oz
(107g)
8.47 oz
(240g)
6.17 oz
(175g)
3.24 oz
(92g)
4.4 oz
(125g)
Dimensions 3.74" x 1.92" x 1"
(95 x 49 x 25.4 mm)
6.73" x 3.06" x 0.37"
(171 x 78 x 9.5 mm)
6.5" x 3.3" x 0.35"
(165 x 84 x 8.9 mm)
3.76" x 1.92" x 0.73"
(96 x 49 x 18.5 mm)
4.1" x 2" x 0.9"
(104 x 51 x 22.9 mm)
Form Factor Clamshell Slab Slab Clamshell Clamshell
Platform / OS (proprietary) Android Android (proprietary) (proprietary)
Network Bands

CDMA: 850, 1900

AMPS: 850

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 18, 19, 20, 26, 28, 29, 32, 34, 38, 39, 40, 41, 46, 66

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

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 12

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

Data Technology 1xRTT LTE (Cat 20) LTE (Cat 4) HSDPA 3.6 EVDO rA
Features 
Fingerprint Reader - Yes
in-display (optical)
Yes - -
Flashlight - Yes Yes - Yes
GPS / Location Yes n/a n/a Yes Yes
Ruggedized - - - - Yes
Water-Resistant - - - - Yes
Accessibility
Adjustable Text Size - n/a n/a - -
Hearing Aid Compatible Yes Yes Yes Yes Yes
Multiple Languages Yes n/a n/a Yes Yes
TTY/TDD (Digital) Yes - Yes Yes Yes
Alerts
Extra Display Yes - - Yes Yes
Ringer Profiles - - - Yes -
Connectivity
Bluetooth Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Mobile Hotspot - n/a n/a - -
NFC - Yes - - -
USB Yes Yes
USB Type C
Yes
USB Type C
Yes Yes
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
Yes
4 (802.11 b,g,n)
- -
Contacts
Picture ID Yes n/a n/a - Yes
Ringer ID Yes n/a n/a - Yes
Voice Dialing Yes 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 Yes n/a n/a - Yes
Dual-SIM - Yes - - -
WAP / Web Browser Yes n/a n/a Yes Yes
Input
Predictive Text Entry - n/a n/a Yes Yes
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware Yes - - - -
Touch Screen - Yes Yes - -
Memory
Memory Card Slot - - Yes - Yes
Messaging
Email Client - n/a n/a Yes Yes
Instant Messaging - n/a n/a Yes 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
Miracast - - Yes - -
TV Output - Yes - - -
Power
Fast Charging - 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
Voice Memo Yes n/a n/a Yes Yes
Software
BREW Yes n/a n/a - Yes
Games Yes n/a n/a Yes Yes
Java (J2ME) - n/a n/a Yes -
Voice
HD Voice - - Yes - -
Headset Jack (2.5 mm) Yes n/a n/a - Yes
Push-To-Talk - - - - Yes
Speaker Phone Yes Yes Yes Yes Yes
  LG AX-490 Asus ROG Phone II ZTE ZMAX Pro ZTE Z221 Casio G'zOne Rock
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone LG AX-490 Asus ROG Phone II ZTE ZMAX Pro ZTE Z221 Casio G'zOne Rock

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