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i-mobile TV 658 Touch&Move vs i-mobile 638CG

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i-mobile TV 658 Touch&Move Remove phone

Posted: 27 Aug 2011
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i-mobile 638CG Remove phone

Posted: 04 Sep 2009
Market Status: Released

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Design
Device typeFeature phoneFeature phone 
Dimensions4.37 x 2.20 x 0.51 inches (111 x 56 x 13 mm)4.45 x 2.01 x 0.57 inches (113 x 51 x 14.5 mm) 
Display
Physical size3.0 inches2.4 inches 
Resolution240 x 400 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.

155 ppi167 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 
TouchscreenYes  
Camera
Camera8 megapixels3 megapixels 
FeaturesFace detection, Smile detection  
CamcorderYesYes 
Hardware
Storage expansionmicroSDmicroSD 
Battery
Talk time4.00 hours
the average is 13 h (751 min)
8.30 hours
the average is 13 h (751 min)
 
Stand-by time12.5 days (300 hours)
the average is 20 days (483 h)
16.7 days (400 hours)
the average is 20 days (483 h)
 
Capacity1100 mAh1050 mAh 
specifications continue after the ad
Multimedia
RadioFMFM 
Broadcast Mobile TVAnalog TVAnalog TV 
Technology
CDMA

CDMA - Code Division Multiple Access. A technique of multiplexing, also called spread spectrum, in which analog signals are converted into digital form for transmission. For each communication channel, the signals are encoded in a sequence known to the transmitter and the receiver for that channel. The foremost application is digital cellular phone technology from QUALCOMM that operates in the 800MHz band and 1.9GHz PCS band. CDMA phones are noted for their excellent call quality and long battery life.

 800 MHz 
GSM900, 1800, 1900 MHz900, 1800, 1900 MHz 
DataEDGEEDGE 
Multiple SIM cards2 slots2 slots 
Connectivity
BluetoothYesYes 
USBYesYes 
Other features
NotificationsMusic ringtones (MP3), Polyphonic ringtonesMusic ringtones (MP3), Polyphonic ringtones, Vibration 
SensorsAccelerometer  

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

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