HTTP User-Agent

Android Browser

My G1 v1.0

Mozilla/5.0 (Linux; U; Android 1.0; en-us; dream) AppleWebKit/525.10+ (KHTML, like Gecko) Version/3.0.4 Mobile Safari/523.12.2

My G2

Mozilla/5.0 (Linux; U; Android 2.2; en-us; T-Mobile G2 Build/FRF91) AppleWebKit/533.1(KHTML, like Gecko) Version/4.0 Mobile Safari/533.1

Internet Explorer Mobile

Internet Explorer Mobile 9 on Windows Phone 7

Internet Explorer Mobile on Wikipedia

Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0; <DeviceManufacturer>; <DeviceModel>)

The UA string in desktop view looks almost similar to that of the Internet Explorer 9 running on Windows 7 with some additional identifiers.

Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; XBLWP7; ZuneWP7)

Browser Market Share – May 2011

Internet Explorer Mobile on a Windows Mobile 7

Mozilla/4.0 (compatible; MSIE 7.0; Windows Phone OS 7.0; Trident/3.1; IEMobile/7.0; <DeviceManufacturer>;<DeviceModel>)

Internet Explorer Mobile on a Windows Mobile 6.1

Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.11)

Internet Explorer Mobile on a Windows Mobile 6

Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 6.12)

Windows Mobile Adapter Kit Updates 3.3

Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 6.8)

Smartphone for Windows Mobile Version 5.0 and before

Mozilla/4.0 (compatible; MSIE 4.01; Windows CE; Smartphone; 176x220)

Windows Mobile 5.0 Pocket PC UA

Mozilla/4.0 (compatible; MSIE 4.01; Windows CE; PPC; 240x320)

Pocket Windows – IE Mobile

MSIE 4.01 … PPC/Smartphone

Microsoft Internet Explorer	54.13%
Firefox	22.28%
Chrome	12.34%
Safari	7.06%
Opera	2.03%
Opera Mini	1.00%

Microsoft Internet Explorer 8.0	31.28%
Microsoft Internet Explorer 6.0	10.36%
Firefox 4.0	10.08%
Chrome 11.0	9.73%
Firefox 3.6	9.14%
Microsoft Internet Explorer 7.0	7.04%
Safari 5.0	4.74%
Microsoft Internet Explorer 9.0	4.19%
Opera 11.x	1.61%
Safari 4.0	1.42%
Firefox 3.5	1.38%
Chrome 10.0	1.20%
Firefox 3.0	0.77%
Netscape 6.0	0.71%
Chrome 8.0	0.35%
Chrome 12.0	0.32%
Opera Mini 4.1	0.32%
Opera Mini 4.2	0.32%
Opera 10.x	0.31%
Chrome 9.0	0.26%
Opera Mini 5.1	0.25%
Safari on Windows 53 – Maxthon Edition	0.24%
Safari on Windows 5.0	0.23%
Microsoft Internet Explorer 6.0 – Tencent Traveler Edition	0.23%
Microsoft Internet Explorer 8.0 – Maxthon Edition	0.22%
Firefox 2.0	0.20%
Safari 4.1	0.19%
Microsoft Internet Explorer 6.0 – TheWorld Edition	0.18%
Microsoft Internet Explorer 8.0 – TheWorld Edition	0.18%
Chrome 6.0	0.17%
Microsoft Internet Explorer 6.0 – Maxthon Edition	0.16%
Microsoft Internet Explorer 8.0 – Tencent Traveler Edition	0.15%
Microsoft Internet Explorer 7.0 – Maxthon Edition	0.14%
Safari 3.1	0.12%
Safari 41	0.12%
Opera Mini 6.0	0.11%
Opera 9.x	0.11%
Chrome 5.0	0.11%
Chrome 13.0	0.10%
Chrome 7.0	0.10%

Microsoft Internet Explorer

http://msdn.microsoft.com/en-us/library/ms537503(v=vs.85).aspx
http://www.useragentstring.com/pages/Internet+Explorer/

Mozilla/1.22 (compatible; MSIE 2.0; Windows 3.1) – IE 2.0 on Win 3.1
Mozilla/1.22 (compatible; MSIE 2.0; Windows 95) – IE 2.0 on Win95
Mozilla/2.0 (compatible; MSIE 3.02; Windows 3.1) – IE 3.02 on Win 3.1
Mozilla/4.0 (compatible; MSIE 4.0; Windows 95) – IE 4.0 on Win95
Mozilla/4.0 (compatible; MSIE 4.01; Windows NT) – IE 4.01 on WinNT 4.0
Mozilla/4.0 (compatible; MSIE 5.00; Windows 98) – IE 5.00 on Win98
Mozilla/4.0 (compatible; MSIE 5.2; Mac_PowerPC) – IE 5.2 on Mac
Mozilla/4.0 (compatible;MSIE 5.5; Windows 98) – IE 5.5 on Win98
Mozilla/4.0 (compatible; MSIE 5.5b1; Mac_PowerPC) – IE 5.5 on Mac
Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0;) – IE 6 on Win2K
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0;) – IE 6 on Win2K
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) – IE 6 on WinXP SP2
Mozilla/4.0 (compatible; MSIE 6.1; Windows XP;) – IE 6 on WinXP SP2
Mozilla/5.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1) – IE 6 on Win2003 Server
Mozilla/5.0 (compatible; MSIE 7.0; Windows NT 5.2) – IE 7 on Win2003 Server
Mozilla/5.0 (compatible; MSIE 7.0; Windows NT 6.0; .NET CLR 1.1.4322) – IE 7 on Vista
Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; WOW64;) – IE 8 32-bit on Win7 64-bit
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; Win64; IA64) – IE 9 64-bit in Win7 64-bit on Intel 64-bit
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0; Win64; x64) – IE 10 64-bit in Win7 64-bit on AMD 64-bit