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ZTE Z431 vs AT&T Z221

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ZTE Z431 Remove phone

Posted: 20 Feb 2013
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 typeFeature phoneBasic phone 
Dimensions4.49 x 2.4 x 0.41 inches (114 x 61 x 10 mm)3.76 x 1.92 x 0.73 inches (96 x 49 x 19 mm) 
Weight3.34 oz (95 g)
the average is 4.9 oz (139 g)
3.24 oz (92 g)
the average is 4.9 oz (139 g)
 
Display
Physical size2.4 inches2.0 inches 
Resolution320 x 240 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.

167 ppi200 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 14465 536 
Camera
Camera2 megapixels0.3 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 storage0.058 GB  
Storage expansionmicroSD, microSDHC up to 32 GB  
Battery
Talk time4.50 hours
the average is 12 h (699 min)
3.00 hours
the average is 12 h (699 min)
 
Stand-by time12.5 days (216 hours)
the average is 21 days (493 h)
8.3 days (200 hours)
the average is 21 days (493 h)
 
Capacity1000 mAh900 mAh 
specifications continue after the ad
Multimedia
SpeakersEarpiece  
Technology
GSM850, 900, 1800, 1900 MHz850, 900, 1800, 1900 MHz 
UMTS850, 1900, 2100 MHz850, 1900 MHz 
DataUMTS, EDGE, GPRSHSDPA 3.6 Mbit/s, UMTS, EDGE 
Positioning

Positioning - This field shows the positioning systems supported by the device. There are three main types: GPS, A-GPS and GLONASS. GPS - This is one of the most widespread global positioning technologies, developed and maintained by the U.S. government. It uses satellites in order to detect your location. Works best in clear weather. A-GPS - A-GPS stands for Assisted GPS and is the industry standard for positioning and navigation. “Assisted” means that it can use local wireless networks, in addition to satellites, for quicker and more precise localization. GLONASS - GLONASS is a global positioning system, developed by the Russian Federation. It’s very similar to GPS, but isn’t so popular in cell phones.

GPS  
NavigationYes  
Connectivity
Bluetooth2.1, EDR2.0 
USBYesYes 
Connector microUSB 
Other features
NotificationsMusic ringtones, SpeakerphonePolyphonic ringtones, Vibration, Silent mode, Speakerphone 
Hearing aid compatibilityM3, T3M3, T3 
OtherVoice dialing, Voice commandsVoice recording, TTY/TDD 

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

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