The Useragent string is send as a header by every browser and identifies which browser, rendering engine, operating system and sometimes which device model is being used. The header is called User-Agent. Below is a list of 10 unique useragent strings from mobile devices collected by WhichBrowser.

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SAMSUNG-GT-I6410-Vodafone/I6410BUIJD Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1
SAMSUNG-GT-I6410-Vodafone/I6410BUJB7 Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1
SAMSUNG-GT-I6410-Vodafone/I6410BUJI3 Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1
SAMSUNG-GT-I8320-Vodafone/I8320BUIJ4 Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1
SAMSUNG-GT-I8320-Vodafone/I8320BUIJ6 Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1
SAMSUNG-GT-I8320-Vodafone/I8320BUJB2 Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1
SAMSUNG-GT-I8320-Vodafone/I8320BUJC1 Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1
SAMSUNG-GT-I8320-Vodafone/I8320Chinj Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1
SAMSUNG-GT-I8320-Vodafone/I8320I3XV4 Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1
SAMSUNG-GT-I8320-Vodafone/I8320I3XV5 Linux/X2/R1 Opera/9.6 SMS-MMS/1.2.0 profile/MIDP-2.1 configuration/CLDC-1.1