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Phone Samsung M400 Samsung Wafer R510 Samsung SCH-A990 ZTE Prelude / Avail 2 LG AX-390 / UX-390
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 2.4" diag.
4 : 3
1.9" diag.
4 : 3
? 3.5" diag.
5 : 3
?
Display Resolution & Type 240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
220 x 176 pixels
(~148 ppi)
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
320 x 480 pixels
(~165 ppi)
LCD (TFT/TFD)
128 x 128 pixels
LCD (STN)
Display Refresh ? ? ? 60 Hz ?
Battery 1,000 mAh 800 mAh 1,000 mAh 1,500 mAh 1,000 mAh
Processor 400 MHz Qualcomm QSC6155 ? ? 1 GHz Qualcomm Snapdragon MSM7225A ?
RAM 128 MB ? ? 512 MB ?
Storage 256 MB ? raw hardware ? raw hardware 4 GB ? raw hardware
Main Camera 1 megapixel 1 megapixel 3 megapixel 2 megapixel -
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - ? ? VGA (640 x 480) -
Front Camera - - - - -
Weight 3.7 oz
(105g)
2.47 oz
(70g)
4.4 oz
(125g)
4.4 oz
(125g)
3.74 oz
(106g)
Dimensions 3.8" x 1.9" x 0.7"
(97 x 48 x 17.8 mm)
4.45" x 1.97" x 0.33"
(113 x 50 x 8.4 mm)
3.8" x 1.88" x 0.82"
(97 x 48 x 20.8 mm)
4.6" x 2.44" x 0.45"
(117 x 62 x 11.4 mm)
3.82" x 1.98" x 0.94"
(97 x 50 x 23.9 mm)
Form Factor Clamshell Slab Clamshell Slab Clamshell
Platform / OS (proprietary) (proprietary) (proprietary) Android (proprietary)
Network Bands

CDMA: 800, 850, 1900

CDMA: 850, 1900

CDMA: 850, 1900

WCDMA: 2, 5

GSM: 850, 1900

CDMA: 850, 1900

AMPS: 850

Data Technology 1xRTT EVDO r0 EVDO r0 HSPA 7.2 1xRTT
Features 
Flashlight - - Yes - -
GPS / Location Yes Yes Yes n/a Yes
Accessibility
Adjustable Text Size Yes - - n/a -
Hearing Aid Compatible Yes Yes Yes Yes Yes
Multiple Languages Yes Yes Yes n/a Yes
TTY/TDD (Digital) Yes Yes Yes Yes Yes
Alerts
Extra Display Yes - Yes - Yes
Connectivity
Bluetooth Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
-
USB Yes
Micro-USB
- Yes Yes -
Wi-Fi - - - Yes
4 (802.11 b,g,n)
-
Contacts
Picture ID Yes Yes Yes n/a Yes
Ringer ID Yes - Yes n/a -
Voice Dialing Yes Yes Yes n/a Yes
Customization
Custom Graphics Yes Yes Yes n/a Yes
Custom Ringtones Yes Yes Yes n/a Yes
Real-Music Ringers Yes - Yes n/a Yes
Data & Network
Data Tethering - - Yes n/a -
WAP / Web Browser Yes Yes Yes n/a Yes
Input
Predictive Text Entry Yes Yes Yes n/a Yes
Side Keys Yes Yes Yes Yes Yes
Touch Screen - - - Yes -
Memory
Memory Card Slot - Yes Yes Yes -
Messaging
Email Client - - - n/a -
EMS / Picture Messaging - - Yes n/a -
Instant Messaging - - - n/a -
MMS Yes Yes Yes n/a Yes
Text Messaging Templates Yes - Yes n/a -
Music
Headphone Jack (3.5mm) Yes - - Yes -
Music Player - Yes Yes n/a -
Stereo Speakers - Yes Yes - -
Photo & Video
TV Output - - Yes - -
Productivity
Alarm Yes Yes Yes n/a Yes
Calculator Yes Yes Yes n/a Yes
Calendar Yes Yes Yes n/a Yes
Voice Memo Yes Yes Yes n/a Yes
Software
BREW - Yes Yes n/a Yes
Games Yes Yes Yes n/a Yes
Voice
Headset Jack (2.5 mm) - - - n/a Yes
Push-To-Talk - - - - Yes
Speaker Phone Yes Yes Yes Yes Yes
  Samsung M400 Samsung Wafer R510 Samsung SCH-A990 ZTE Prelude / Avail 2 LG AX-390 / UX-390
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung M400 Samsung Wafer R510 Samsung SCH-A990 ZTE Prelude / Avail 2 LG AX-390 / UX-390

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