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Phone Samsung Jitterbug J / SPH-A310 Samsung SGH-A157 Motorola i580
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size 2.1" diag.
4 : 3
1.8" diag.
4 : 3
?
Display Resolution & Type 176 x 220 pixels
(~134 ppi)
LCD (Color)
128 x 160 pixels
(~116 ppi)
LCD (TFT/TFD)
176 x 220 pixels
LCD (TFT/TFD)
Display Refresh ? ? ?
Battery ? 800 mAh ?
Processor ? ? ?
RAM ? ? ?
Storage ? raw hardware 256 MB ? raw hardware
Main Camera - - 1 megapixel
Wide Camera - - -
Tele Camera - - -
Video Capture - - ?
Front Camera - - -
Weight 3.99 oz
(113g)
2.99 oz
(85g)
4.9 oz
(139g)
Dimensions 3.87" x 2.16" x 0.97"
(98 x 55 x 24.6 mm)
3.83" x 1.84" x 0.65"
(97 x 47 x 16.5 mm)
3.68" x 2.2" x 1.2"
(93 x 56 x 30.5 mm)
Form Factor Clamshell Clamshell Clamshell
Platform / OS (proprietary) (proprietary) (proprietary)
Network Bands

CDMA: 850, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

iDEN: 800

Data Technology - ? WiDEN
Features 
GPS / Location Yes Yes Yes
Ruggedized - - Yes
Accessibility
Adjustable Text Size - Yes -
Hearing Aid Compatible Yes
M4, T4 (very tele-coil compatible)
Yes
M4 (very compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages - Yes Yes
TTY/TDD (Digital) - Yes Yes
Alerts
Extra Display Yes - Yes
Ringer Profiles - Yes Yes
Connectivity
Bluetooth Yes - Yes
USB - Yes
Micro-USB
-
Contacts
Picture ID - Yes Yes
Ringer ID - Yes Yes
Voice Dialing Yes - Yes
Customization
Custom Graphics - Yes Yes
Custom Ringtones - Yes Yes
Real-Music Ringers - Yes -
Data & Network
Data Tethering - - Yes
WAP / Web Browser - Yes Yes
Input
Predictive Text Entry - Yes Yes
Side Keys Yes - Yes
Memory
Memory Card Slot - - Yes
Messaging
MMS - Yes Yes
Text Messaging Templates Yes Yes Yes
Music
Music Player - - Yes *
Productivity
Alarm - Yes -
Calculator - Yes Yes *
Calendar - Yes Yes
To-Do List - Yes -
Voice Memo - Yes Yes
Software
Games - - Yes
Java (J2ME) - - Yes
Voice
Headset Jack (2.5 mm) - - Yes
Push-To-Talk - - Yes
Speaker Phone Yes Yes Yes
  * Some versions only
  Samsung Jitterbug J / SPH-A310 Samsung SGH-A157 Motorola i580
  X > < X > < X

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

 
Phone Samsung Jitterbug J / SPH-A310 Samsung SGH-A157 Motorola i580

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