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 58 unique useragent strings from mobile devices collected by WhichBrowser.

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MOT-XT536/1.0 Android/2.3.7 Release/2.28.2012 Browser/AppleWebKit533.1 Mozilla/5.0 (Linux; U; Android 2.3.7; xx; XT536 Build/GWK74) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTM
Mozilla/5.0 (Linux; Android 4.4.2; Coolpad 8297 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.
Mozilla/5.0 (Linux; Android 4.4.2; H30-T10 Build/HuaweiH30-T10) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/53
Mozilla/5.0 (Linux; Android 4.4.4; HUAWEI Y635-CL00 Build/HuaweiY635-CL00) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobil
Mozilla/5.0 (Linux; Android 4.4.4; Lenovo K30-T Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.
Mozilla/5.0 (Linux; Android 4.4.4; M355 Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36; 360 Aphone FreeBrowser (2.0.2beta)Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrow
Mozilla/5.0 (Linux; Android 5.0.2; Redmi Note 2 Build/LRX22G) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/37.0.0.0 Mobile Safari/537.36; 360 Aphone FreeBrowser (2.0.2beta)Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) N
Mozilla/5.0 (Linux; Android 5.1.1; Che2-UL00 Build/HonorChe2-UL00) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/39.0.0.0 Mobile Safari/537.36; 360 Aphone FreeBrowser (2.1.2beta)Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gec
Mozilla/5.0 (Linux; Android 5.1.1; LS980 4G Build/LMY48I) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/39.0.0.0 Mobile Safari/537.36Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (Linux; Android 5.1.1; MI 4 Build/LMY48G; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/46.0.2490.41 Mobile Safari/537.36; 360 Aphone FreeBrowser (2.0.2beta)Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) N
Mozilla/5.0 (Linux; Android 5.1.1; NX505J Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.121 Mobile Safari/537.36Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/5
Mozilla/5.0 (Linux; Android 5.1.1; NX505J Build/LMY47V; xx) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.121 Mobile Safari/537.36Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/5
Mozilla/5.0 (Linux; Android 5.1.1; SM-G9200 Build/LMY47X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.121 Mobile Safari/537.36; 360 Aphone FreeBrowser (2.0.1beta)Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gec
Mozilla/5.0 (Linux; Android 5.1; PRO 5 Build/LMY47D) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/40.0.2214.114 Mobile Safari/537.36; 360 Aphone FreeBrowser (2.1.2beta)Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) Nokia
Mozilla/5.0 (Linux; U; Android 2.3.5; xx; Lenovo A300t Build/MocorDroid2.3.5) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (Linux; U; Android 4.2.2; xx; 2014011 Build/HM2014011) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (Linux; U; Android 4.2.2; xx; R820 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30; 360 Aphone FreeBrowser (2.1.2beta)Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0
Mozilla/5.0 (Linux; U; Android 4.3; xx; GT-I9300 Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (Linux; U; Android 4.3; xx; HUAWEI C8816 Build/HuaweiC8816) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (Linux; U; Android 4.3; xx; LNV-Lenovo A505e Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (MeeGo) AppleWebKit/534.34 (KHTML, like Gecko) FilesPlus Mobile Safari/534.34
Mozilla/5.0 (MeeGo) AppleWebKit/534.34 (KHTML, like Gecko) HeliumMobileBrowser/1.0.0 Mobile Safari/534.34
Mozilla/5.0 (MeeGo) AppleWebKit/534.34 (KHTML, like Gecko) MockSurf Mobile Safari/534.34
Mozilla/5.0 (MeeGo) AppleWebKit/534.34 (KHTML, like Gecko) NokiaBrowser/8.5.0/8.5.0 Mobile Safari/534.34
Mozilla/5.0 (MeeGo) AppleWebKit/534.34 (KHTML, like Gecko) Qt/4.7.4 Mobile Safari/534.34
Mozilla/5.0 (MeeGo) AppleWebKit/534.34 (KHTML, like Gecko) tbsign/1.0.2 Mobile Safari/534.34
Mozilla/5.0 (MeeGo) KMEngine/535.12 (KHTML, like Gecko) KMBrower/3.0
Mozilla/5.0 (MeeGo/N9; MeeGo/5.3 NokiaN9/111; Profile/MIDP-2.1 Configuration/CLDC-1.1 ) AppleWebKit/533.4 (KHTML, like Gecko) NokiaBrowser/7.4.1.8 Mobile Safari/533.4
Mozilla/5.0 (MeeGo; N9) AppleWebKit/533.3 (KHTML, like Gecko) NokiaBrowser/8.5 Mobile Safari/533.3
Mozilla/5.0 (MeeGo; NokiaN9)
Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML
Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML) NokiaBrowser/1100 Mobile
Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML) NokiaBrowser/1100 Mobile Safari/534.13
Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) 360Browser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (MeeGo; NokiaN950-00/00) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (MeeGo; U; xx) AppleWebKit/534.3 (KHTML, like Gecko) HeliumMobileBrowser/1.0.0 Safari/534.3
Mozilla/5.0 (MeeGo; U; xx) AppleWebKit/534.3 (KHTML, like Gecko) Qt/4.7.4 Safari/534.3
Mozilla/5.0 (MeeGo; xiaomi) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/5.0 (Nokia; Qt; MeeGo)
Mozilla/5.0(MeeGo;NokiaN9)AppleWebKit/534.13(KHTML,like Gecko)NokiaBrowser/8.5.0 Mobile Safari/534.13
Mozilla/7 (MeeGo; NokiaN9)
Mozilla/7 (MeeGov; NokiaN9)
Opera/9.80 (Linux armv7l; Opera Mobi/1; MeeGo) Presto/2.11.355 Version/12.10
Opera/9.80 (Linux armv7l; Opera Mobi/1; MeeGo) Presto/2.11.355 Version/12.10   Array (     [browser_name_regex] => ?^opera/9\.80.*\(.*linux.*\).*version/12\.10.*$?     [browser_name_pattern] => Opera/9.80*(*Linux*)*Version/12.10*     [parent] => Opera 12
Opera/9.80 (Linux armv7l; Opera Mobi/1; MeeGo; NokiaN9) Presto/2.11.355 Version/12.10
Opera/9.80 (Linux armv7l; Opera Mobi/3; MeeGo) Presto/2.11.355 Version/12.10
Opera/9.80 (Linux armv7l; Opera Mobi/6; MeeGo) Presto/2.11.355 Version/12.10
Opera/9.80 (Linux i686; Opera Mobi/23731; MeeGo; U; xx) Presto/2.9.201 Version/11.50
Opera/9.80 (Linux i686; Opera Mobi/2; MeeGo; U; xx) Presto/2.10.254 Version/12.00
Opera/9.80 (Linux i686; Opera Mobi/32904; MeeGo; U; xx) Presto/2.10.254 Version/12.00
Opera/9.80 (Linux i686; Opera Mobi/35779; MeeGo; U; xx) Presto/2.10.254 Version/12.00
Opera/9.80 (Linux i686; Opera Mobi/46154; MeeGo) Presto/2.11.355 Version/12.10
Opera/9.80 (Linux i686; Opera Tablet/23731; MeeGo; U; xx) Presto/2.9.201 Version/11.50
Opera/9.80 (Linux i686; Opera Tablet/2; MeeGo; U; xx) Presto/2.10.254 Version/12.00
Opera/9.80 (Linux i686; Opera Tablet/46154; MeeGo) Presto/2.11.355 Version/12.10
Opera/9.80 (Linux; Opera Mobi/8; MeeGo; U; xx) Presto/2.10.254 Version/12.00