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Samsung DoubleTime vs AT&T Impulse 4G

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Samsung DoubleTime Remove phone

phone
Also known as Samsung SGH-I857 PA Rating - 4
Posted: 11 Oct 2011
Market Status: Released US carrier availability: AT&T - Discontinued

AT&T Impulse 4G Remove phone

phone
Also known as Huawei Impulse 4G PA Rating - 6.5
User Rating - 6.5

Posted: 07 Sep 2011
Market Status: Released US carrier availability: AT&T - Discontinued

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Design
Device typeSmart phoneSmart phone 
OSAndroid (2.2)Android (2.2) 
Form factorClamshellCandybar 
Dimensions4.45 x 2.44 x 0.59 inches (113 x 62 x 15 mm)4.72 x 2.56 x 0.46 inches (120 x 65 x 11.6 mm) 
Weight5.22 oz (148 g)
the average is 4.4 oz (127 g)		4.41 oz (125 g)
the average is 4.4 oz (127 g)		 
Design featuresFull keyboard  
Side KeysLeft: Volume control  
Display
Physical size3.2 inches3.8 inches 
Resolution320 x 480 pixels480 x 800 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.

180 ppi246 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 
TouchscreenCapacitive, Multi-touchCapacitive, Multi-touch 
FeaturesProximity sensorProximity sensor 
Additional display

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

Color, TFT  
Resolution

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

480 x 320 pixels  
Physical Size3.20 inches  
Colors

Colors - Shows the number of colors that the additional display supports

262 144  
Touch screenCapacitive  
Multi-touchYes  
Battery
Talk time6.00 hours
the average is 11 h (647 min)		4.00 hours
the average is 11 h (647 min)		 
Stand-by time10.4 days (250 hours)
the average is 18 days (441 h)		10.0 days (240 hours)
the average is 18 days (441 h)		 
Capacity1200 mAh1500 mAh 
TypeLi - IonLi - 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, 800 MHz, Qualcomm S1Single core 
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.

256 MB RAM  
Built-in storage0.26 GB0.512 GB 
Storage expansionmicroSD, microSDHC up to 32 GBmicroSD, microSDHC up to 32 GB 
Camera
Camera3.2 megapixels5 megapixels 
Flash LED 
FeaturesAuto focus, Digital zoom, Macro modeAuto focus 
Camcorder320x240 (QVGA) (29 fps)1280x720 (720p HD) (30 fps) 
specifications continue after the ad
Multimedia
Music player   
Filter byAlbum, Artist, PlaylistsAlbum, Artist, Playlists 
FeaturesAlbum art cover, Background playbackAlbum art cover, Background playback 
Supported formatsMP3, AAC, WMA, WAV, M4A (Apple lossless), MP4, 3GP, MIDIMP3, AAC, WMA, WAV, 3GP 
Video playback   
Supported formatsMPEG4, H.263, H.264MPEG4, H.263, H.264 
SpeakersEarpiece, LoudspeakerEarpiece, Loudspeaker 
YouTube playerYesYes 
Internet browsing
Browser   
supportsHTMLHTML, Flash 
Built-in online services supportFacebook, Twitter  
Technology
GSM850, 900, 1800, 1900 MHz850, 900, 1800, 1900 MHz 
UMTS850, 1900, 2100 MHz850, 1900, 2100 MHz 
DataHSDPA 7.2 Mbit/s, UMTS, EDGE, GPRSHSPA (unspecified), UMTS, EDGE 
Global RoamingYesYes 
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.

GPSGPS 
NavigationYes  
Phone features
PhonebookUnlimited entries, Caller groups, Multiple numbers per contact, Search by both first and last name, Picture ID, Ring IDUnlimited entries, Caller groups, Multiple numbers per contact, Search by both first and last name, Picture ID, Ring ID 
OrganizerCalendar, Alarm, CalculatorCalendar, Alarm, Calculator 
MessagingSMS, MMS, Threaded view, Predictive text inputSMS, MMS, Threaded view, Predictive text input 
E-mailIMAP, POP3, SMTPIMAP, POP3, SMTP 
Instant MessagingGoogle TalkGoogle Talk 
GamesYesYes 
Connectivity
Bluetooth3.02.1 
ProfilesAdvanced Audio Distribution (A2DP), Audio/Video Control Transport Protocol (AVCTP), Audio/Video Distribution Transport Protocol (AVDTP), Audio/Visual Remote Control Profile (AVRCP), File Transfer (FTP), Generic Access (GAP), Generic Audio/Video Distribution (GAVDP), Handsfree (HFP), Headset (HSP), Logical Link Control and Adaptation Protocol, Object Push (OPP), Phone Book Access (PBAP), Serial Port (SPP), Service Discovery Protocol (SDP)  
Wi-FiYesYes 
Mobile hotspotYesYes 
USBUSB 2.0Yes 
ConnectormicroUSBmicroUSB 
FeaturesMass storage device, USB chargingMass storage device, USB charging 
Headphones connector3.5mm3.5mm 
Charging connectormicroUSBmicroUSB 
OtherTethering, Computer sync, OTA syncTethering, Computer sync, OTA sync 
Other features
NotificationsMusic ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, SpeakerphoneMusic ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone 
SensorsAccelerometerAccelerometer 
Hearing aid compatibilityM4, T3M3, T3 
OtherVoice dialing, Voice commands, Voice recording, TTY/TDDVoice dialing, Voice commands, Voice recording, TTY/TDD 
Regulatory Approval
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.

   
Head0.54 W/kg  
Body0.97 W/kg  
Availability
Officially announced 07 Sep 2011 
Shopping information
MSRP price   
$ 400$ 280 

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