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Samsung SGH-T139 vs AT&T Z221

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Samsung SGH-T139 Remove phone

Posted: 29 Jan 2010
Market Status: Released
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AT&T Z221 Remove phone

Posted: 28 Sep 2011
Market Status: Released

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Design
Device typeBasic phoneBasic phone 
Dimensions3.74 x 1.89 x 0.72 inches (95 x 48 x 18 mm)3.76 x 1.92 x 0.73 inches (96 x 49 x 19 mm) 
Weight2.98 oz (84 g)
the average is 4.8 oz (138 g)
3.24 oz (92 g)
the average is 4.8 oz (138 g)
 
Display
Physical size 2.0 inches 
Resolution128 x 160 pixels240 x 320 pixels 
Pixel density

Pixel density - The pixel density of a display represents the number of pixels over an area of one inch. It’s measured in “pixels per inch”, or ppi. The higher the number, the more detailed and good-looking the display is.

 200 ppi 
Technology

Technology - There are two main screen technologies currently used in phones and tablets: LCD and AMOLED. The former usually features a light source and liquid crystals, while the latter is based on organic light-emitting diodes. Newer LCD variations like IPS-LCD and Super-LCD allow for very accurate color reproduction and very wide viewing angles, where no significant image quality loss is observed. Current AMOLED screens differ in such a way that they can exhibit much more saturated colors (sometimes too much) and incredibly high contrast levels, which is due to black color being completely black in AMOLED displays.

TFTTFT 
Colors65 53665 536 
Additional display

Additional display - Shows specs of the phone's additional display

Yes  
Resolution

Resolution - Refers to the width and the length od the additional display

96 x 96 pixels  
Physical Size1.00 inches  
Camera
Camera0.3 megapixels VGA0.3 megapixels VGA 
FeaturesDigital zoom  
Camcorder Yes 
Hardware
System memory

System memory - System memory, or RAM memory is the type of memory that the device uses to temporarily store data from the OS or currently-running apps. The more RAM available to the device, the better the performance will be when multiple or heavier programs are running.

 64 MB RAM / 128 MB ROM 
Built-in storage0.01 GB  
Battery
Talk time7.00 hours
the average is 12 h (713 min)
3.00 hours
the average is 12 h (713 min)
 
Stand-by time12.5 days (300 hours)
the average is 20 days (489 h)
8.3 days (200 hours)
the average is 20 days (489 h)
 
Capacity800 mAh900 mAh 
specifications continue after the ad
Internet browsing
BrowserNF3.4 Lite  
Technology
GSM850, 1900 MHz850, 900, 1800, 1900 MHz 
UMTS 850, 1900 MHz 
DataGPRSHSDPA 3.6 Mbit/s, UMTS, EDGE 
Connectivity
Bluetooth2.0, EDR2.0 
USB Yes 
Connector microUSB 
OtherComputer sync, OTA sync, SyncML  
Other features
NotificationsPolyphonic ringtones (40 voices), Vibration, SpeakerphonePolyphonic ringtones, Vibration, Silent mode, Speakerphone 
Hearing aid compatibilityM4, T4M3, T3 
OtherVoice recordingVoice recording, TTY/TDD 

To see the full specifications with in-depth details click here.

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