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Phone Motorola Droid Pro Alcatel Go Flip 3 / SmartFlip Samsung Knack U310 LG AX-390 / UX-390 Nokia XR21
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 3.1" diag.
5 : 3
2.8" diag.
4 : 3
2.2" diag.
4 : 3
? 6.5" diag.
20 : 9
Display Resolution & Type 320 x 480 pixels
(~186 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~143 ppi)
LCD (TFT/TFD)
176 x 220 pixels
(~128 ppi)
LCD (TFT/TFD)
128 x 128 pixels
LCD (STN)
1080 x 2400 pixels
(~406 ppi)
LCD (TFT/TFD)
Display Refresh 60 Hz ? ? ? 60 Hz
Battery 1,420 mAh 1,350 mAh 1,000 mAh 1,000 mAh 4,800 mAh
Processor 1 GHz TI OMAP3620 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) ? ? Snapdragon 695
RAM ? 512 MB ? ? 6 GB
Storage ? raw hardware 4 GB ? raw hardware ? raw hardware 128 GB
Main Camera 5 megapixel 2 megapixel - - 64 megapixel
Wide Camera - - - - 8 megapixel
Tele Camera - - - - -
Video Capture WVGA / 480p 720p HD - - 1080p HD
Front Camera - - - - 16 megapixel
Weight 4.73 oz
(134g)
4.16 oz
(118g)
3.63 oz
(103g)
3.74 oz
(106g)
8.16 oz
(231g)
Dimensions 4.69" x 2.36" x 0.46"
(119 x 60 x 11.7 mm)
4.13" x 2.09" x 0.75"
(105 x 53 x 19.1 mm)
3.78" x 2.01" x 0.74"
(96 x 51 x 18.8 mm)
3.82" x 1.98" x 0.94"
(97 x 50 x 23.9 mm)
6.61" x 3.09" x 0.41"
(168 x 78 x 10.4 mm)
Form Factor Slab Clamshell Clamshell Clamshell Slab
Platform / OS Android (proprietary) (proprietary) (proprietary) Android
Network Bands

WCDMA: 1, 2, 5

CDMA: 850, 1900

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 5, 12, 14, 25, 26, 41, 66, 71

WCDMA: 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

CDMA: 850, 1900

CDMA: 850, 1900

AMPS: 850

5G: 1, 2, 3, 5, 7, 20, 25, 28, 40, 41, 66, 71, 77-C, 78, 79, 260, 261

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 43, 48, 66, 71

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

Data Technology EVDO rA LTE (Cat 4) - 1xRTT NR (5G)
Features 
Barometer - - - - Yes
Fingerprint Reader - - - - Yes
stand-alone
Flashlight - - - - Yes
GPS / Location n/a Yes Yes Yes n/a
Ruggedized - - - - Yes
Water-Resistant - - - - Yes
IPX8 (SCUBA)
Accessibility
Adjustable Text Size n/a Yes Yes - n/a
Hearing Aid Compatible Yes
M3, T3 (mostly tele-coil compatible)
Yes
M4, T4 (very tele-coil compatible)
Yes
M4, T4 (very tele-coil compatible)
Yes
M3 (mostly compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages n/a Yes Yes Yes n/a
TTY/TDD (Digital) Yes Yes Yes Yes -
Alerts
Extra Display - Yes Yes Yes -
Connectivity
Bluetooth Yes Yes - - Yes
Mobile Hotspot n/a Yes * - - n/a
NFC - - - - Yes
USB Yes
Micro-USB
Yes
Micro-USB
- - Yes
USB Type C
Wi-Fi Yes
4 (802.11 b,g,n)
Yes
4 (802.11 b,g,n)
- - Yes
6 (802.11 a,ac,ax,b,g,n)
Contacts
Picture ID n/a Yes - Yes n/a
Ringer ID n/a Yes - - n/a
Voice Dialing n/a Yes Yes Yes n/a
Customization
Custom Graphics n/a Yes - Yes n/a
Custom Ringtones n/a Yes - Yes n/a
Real-Music Ringers n/a Yes - Yes n/a
Data & Network
Data Tethering n/a Yes - - n/a
Dual-SIM - - - - Yes
WAP / Web Browser n/a Yes - Yes n/a
Input
Predictive Text Entry n/a Yes Yes Yes n/a
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware Yes - - - -
Touch Screen Yes
Capacitive
- - - Yes
Capacitive
Memory
Memory Card Slot Yes Yes - - -
Messaging
Email Client n/a Yes - - n/a
EMS / Picture Messaging n/a - Yes - n/a
Instant Messaging n/a Yes - - n/a
MMS n/a Yes - Yes n/a
Music
FM Radio - Yes - - Yes
Headphone Jack (3.5mm) Yes Yes - - Yes
Music Player n/a Yes - - n/a
Photo & Video
DLNA Yes - - - -
Power
Fast Charging - - - - Yes
Productivity
Alarm n/a Yes Yes Yes n/a
Calculator n/a Yes Yes Yes n/a
Calendar n/a Yes Yes Yes n/a
Voice Memo n/a Yes - Yes n/a
Software
BREW n/a - - Yes n/a
Games n/a Yes - Yes n/a
Voice
HD Voice - Yes - - -
Headset Jack (2.5 mm) n/a - Yes Yes n/a
Push-To-Talk - - - Yes -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Motorola Droid Pro Alcatel Go Flip 3 / SmartFlip Samsung Knack U310 LG AX-390 / UX-390 Nokia XR21
  X > < X > < X > < X > < X

NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Motorola Droid Pro Alcatel Go Flip 3 / SmartFlip Samsung Knack U310 LG AX-390 / UX-390 Nokia XR21

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