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Phone Samsung Gloss SCH-U440 Samsung SGH-X640 ZTE Blade Z Max Samsung Galaxy J3 (2017, GSM) / J3 Prime / Express Prime 2 / Amp Prime 2 / Sol 2 Samsung Galaxy A71 5G
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 2.2" diag.
4 : 3
? 6" diag.
16 : 9
5" diag.
16 : 9
6.7" diag.
20 : 9
Display Resolution & Type 220 x 176 pixels
(~128 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
1080 x 1920 pixels
(~367 ppi)
LCD (TFT/TFD)
720 x 1280 pixels
(~294 ppi)
LCD (TFT/TFD)
1080 x 2400 pixels
(~393 ppi)
AMOLED
Display Refresh ? ? 60 Hz 60 Hz 60 Hz
Battery 800 mAh 800 mAh 4,080 mAh 2,600 mAh 4,500 mAh
Processor ? ? 1.4 GHz Qualcomm Snapdragon 435 (MSM8940) 1.4 GHz Samsung Exynos 7 Quad (7570) 2.4 GHz Qualcomm Snapdragon 765
RAM ? ? 2 GB 1.5 GB 6 GB
Storage ? raw hardware ? raw hardware 32 GB 16 GB 128 GB
Main Camera 1 megapixel Yes 16 megapixel 5 megapixel 64 megapixel
Wide Camera - - - - 12 megapixel
Tele Camera - - - - -
Video Capture - - 1080p HD 1080p HD 4K UHD
Front Camera - - 8 megapixel 2 megapixel 32 megapixel
Weight 3.55 oz
(101g)
3 oz
(85g)
6.58 oz
(186g)
5.2 oz
(147g)
6.52 oz
(185g)
Dimensions 2.55" x 2.94" x 0.82"
(65 x 75 x 20.8 mm)
3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
6.51" x 3.28" x 0.33"
(165 x 83 x 8.3 mm)
5.54" x 2.76" x 0.34"
(141 x 70 x 8.6 mm)
6.39" x 2.97" x 0.31"
(162 x 75 x 7.9 mm)
Form Factor Clamshell Clamshell Slab Slab Slab
Platform / OS (proprietary) (proprietary) Android Android Android
Network Bands

CDMA: 850, 1900

GSM: 900, 1800, 1900

4G LTE: 2, 4, 5, 12, 66

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 5, 12

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

5G: 2, 5, 41, 66, 71, 260, 261

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 66, 71

WCDMA: 1, 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

Data Technology 1xRTT GPRS LTE (Cat 6) LTE (Cat 4) NR (5G)
Features 
Fingerprint Reader - - Yes
stand-alone
- Yes
in-display (optical)
Flashlight - - Yes Yes Yes
GPS / Location Yes - n/a n/a n/a
Accessibility
Hearing Aid Compatible Yes - Yes Yes Yes
Multiple Languages Yes Yes n/a n/a n/a
TTY/TDD (Digital) Yes - Yes Yes Yes
Alerts
Extra Display Yes - - - -
Connectivity
Bluetooth Yes - Yes Yes Yes
NFC - - - - Yes
USB Yes - Yes
USB Type C
Yes
Micro-USB
Yes
USB Type C
Wi-Fi - - Yes
4 (802.11 b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Contacts
Picture ID Yes Yes n/a n/a n/a
Ringer ID Yes Yes n/a n/a n/a
Voice Dialing Yes - n/a n/a n/a
Customization
Custom Graphics Yes Yes n/a n/a n/a
Custom Ringtones Yes Yes n/a n/a n/a
Real-Music Ringers Yes - n/a n/a n/a
Data & Network
WAP / Web Browser - Yes n/a n/a n/a
Input
Predictive Text Entry - Yes n/a n/a n/a
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware Yes - - - -
Touch Screen - - Yes Yes Yes
Memory
Memory Card Slot Yes - Yes Yes Yes
Messaging
EMS / Picture Messaging - Yes n/a n/a n/a
MMS Yes Yes n/a n/a n/a
Text Messaging Templates Yes Yes n/a n/a n/a
Music
FM Radio - - Yes Yes -
Headphone Jack (3.5mm) - - Yes Yes Yes
Music Player Yes - n/a n/a n/a
Power
Fast Charging - - Yes - Yes
Productivity
Alarm Yes Yes n/a n/a n/a
Calculator Yes Yes n/a n/a n/a
Calendar Yes Yes n/a n/a n/a
To-Do List - Yes n/a n/a n/a
Voice Memo Yes Yes n/a n/a n/a
Software
BREW Yes - n/a n/a n/a
Games Yes Yes n/a n/a n/a
Java (J2ME) - Yes n/a n/a n/a
Voice
HD Voice - - Yes Yes Yes
Headset Jack (2.5 mm) Yes Yes n/a n/a n/a
Speaker Phone Yes Yes Yes Yes Yes
  Samsung Gloss SCH-U440 Samsung SGH-X640 ZTE Blade Z Max Samsung Galaxy J3 (2017, GSM) / J3 Prime / Express Prime 2 / Amp Prime 2 / Sol 2 Samsung Galaxy A71 5G
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung Gloss SCH-U440 Samsung SGH-X640 ZTE Blade Z Max Samsung Galaxy J3 (2017, GSM) / J3 Prime / Express Prime 2 / Amp Prime 2 / Sol 2 Samsung Galaxy A71 5G

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