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Phone Samsung Knack U310 Samsung SCH-A530 Ericsson R278d
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size 2.2" diag.
4 : 3
? ?
Display Resolution & Type 176 x 220 pixels
(~128 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (STN)
101 x 40 pixels
Display Refresh ? ? ?
Battery 1,000 mAh ? ?
Processor ? ? ?
RAM ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware
Main Camera - - -
Wide Camera - - -
Tele Camera - - -
Video Capture - - -
Front Camera - - -
Weight 3.63 oz
(103g)
3 oz
(85g)
9.28 oz
(263g)
Dimensions 3.78" x 2.01" x 0.74"
(96 x 51 x 18.8 mm)
3.18" x 1.67" x 0.9"
(81 x 42 x 22.9 mm)
5.1" x 2" x 1"
(130 x 51 x 25.4 mm)
Form Factor Clamshell Clamshell Slab
Platform / OS (proprietary) (proprietary) (proprietary)
Network Bands

CDMA: 850, 1900

CDMA: 850, 1900

TDMA: 850, 1900

AMPS: 850

Data Technology - 1xRTT -
Features 
GPS / Location Yes Yes -
Accessibility
Adjustable Text Size Yes - -
Hearing Aid Compatible Yes
M4, T4 (very tele-coil compatible)
- -
Multiple Languages Yes Yes Yes
TTY/TDD (Digital) Yes - -
Alerts
Extra Display Yes Yes -
Ringer Profiles - - Yes
Contacts
Picture ID - Yes -
Ringer ID - Yes -
Voice Dialing Yes Yes -
Customization
Custom Graphics - Yes -
Custom Ringtones - Yes Yes
Data & Network
Data Tethering - Yes Yes
WAP / Web Browser - Yes Yes
Input
Predictive Text Entry Yes Yes Yes
Side Keys Yes Yes Yes
Messaging
EMS / Picture Messaging Yes - -
Productivity
Alarm Yes Yes Yes
Calculator Yes Yes -
Calendar Yes Yes -
To-Do List - Yes -
Voice Memo - Yes -
Software
BREW - Yes -
Games - Yes -
Voice
Headset Jack (2.5 mm) Yes Yes -
Speaker Phone Yes - -
  Samsung Knack U310 Samsung SCH-A530 Ericsson R278d
  X > < X > < X

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Phone Samsung Knack U310 Samsung SCH-A530 Ericsson R278d

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