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AT&T Z331 vs Samsung A157

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AT&T Z331 Remove phone

phone
Also known as ZTE Z331 User Rating - 8

Posted: 14 Oct 2011
Market Status: Released US carrier availability: AT&T - Discontinued

Samsung A157 Remove phone

phone
Also known as Samsung SGH-A157
Posted: 21 Feb 2012
Market Status: Released US carrier availability: AT&T - Available (since 16 Aug 2012)

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Design
Device typeFeature phoneBasic phone 
Form factorClamshellClamshell 
Dimensions3.86 x 2.03 x 0.67 inches (98 x 52 x 17 mm)3.83 x 1.84 x 0.65 inches (97 x 47 x 17 mm) 
Weight3.17 oz (90 g)
the average is 4.4 oz (126 g)		2.99 oz (85 g)
the average is 4.4 oz (126 g)		 
Design featuresNumeric keypad, Soft keys, D-Pad (2)  
Display
Physical size2.4 inches1.8 inches 
Resolution240 x 320 pixels128 x 160 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.

167 ppi116 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 
Colors262 144262 144 
Additional display

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

Color, OLED  
Resolution

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

128 x 128 pixels  
Physical Size1.46 inches  
Battery
Talk time3.00 hours
the average is 10 h (626 min)		5.00 hours
the average is 10 h (626 min)		 
Stand-by time8.3 days (200 hours)
the average is 18 days (435 h)		10.0 days (240 hours)
the average is 18 days (435 h)		 
Capacity950 mAh800 mAh 
TypeLi - Ion  
Hardware
Processor

Processor - The processor is the main computing component of a phone and is a major factor when it comes to the overall speed of the device. Some more powerful smartphones use dual-core and quad-core processors designed to deliver greater performance.

 Single core, 416 MHz 
Built-in storage0.14 GB256 GB 
Storage expansionmicroSD, microSDHC up to 8 GB  
Camera
Camera3 megapixels  
CamcorderOther, 176 x 144 pixels  
specifications continue after the ad
Multimedia
Music player   
Supported formatsMP3, AAC+MP3, AAC, WMA, WAV, MP4, AMR, 3GP, MIDI 
Video playback   
Supported formatsMPEG4, H.263, H.264  
RadioFM  
Internet browsing
BrowserOpera Mini, supports: supports: XHTML, WAP, CSS  
Technology
GSM850, 900, 1800, 1900 MHz850, 900, 1800, 1900 MHz 
UMTS850, 1900, 2100 MHz850, 1900 MHz 
DataHSDPA 3.6 Mbit/s, UMTS, EDGEUMTS, EDGE, GPRS 
Global RoamingYesYes 
Phone features
OrganizerCalendar, Alarm, Calculator  
MessagingSMS, MMS, Predictive text inputSMS, Predictive text input (T9, XT9) 
E-mailIMAP, POP3, SMTP  
Instant MessagingYes  
JAVA

JAVA - J2ME (Java 2 Platform, Micro Edition) is a technology that allows programmers to use the Java programming language and related tools to develop programs for mobile wireless information devices such as cellular phones and personal digital assistants (PDAs). J2ME consists of programming specifications and a special virtual machine, the K Virtual Machine, that allows a J2ME-encoded program to run in the mobile device.

Midp 2.0, CLDC 1.1  
Connectivity
Bluetooth2.0  
USBUSB 1.1  
Other features
NotificationsVibration, Silent mode, SpeakerphoneFlight mode, Speakerphone 
Hearing aid compatibilityM3, T4M4 
OtherTTY/TDDTTY/TDD 
Regulatory Approval
FCC approval

FCC approval - The Federal Communications Commission (FCC) is an independent United States government agency, directly responsible to Congress. The FCC was established by the Communications Act of 1934 and is charged with regulating interstate and international communications by radio, television, wire, satellite and cable. The FCC's jurisdiction covers the 50 states, the District of Columbia, and U.S. possessions. Every wireless phone device that that is sold in the U.S. has to be tested and approved for sale by the FCC.

   
Date approved

Date approved - Shows the date when the particular phone is approved by the Federal Communications Commission

 16 Feb 2012 
 FCC ID value: A3LSGHA157 link 
FCC measured SAR

FCC measured SAR - The exposure standard for mobile devices employs a unit of measurement known as the Specific Absorption Rate, or SAR. The SAR limit stated in the international guidelines is 2.0 W/ kg*. Tests for SAR are conducted using standard operating positions with the device transmitting at its highest certified power level in all tested frequency bands. Although the SAR is determined at the highest certified power level, the actual SAR of the device while operating can be well below the maximum value.

   
Head 0.34 W/kg 
Body 0.67 W/kg 

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