From the IE Mobile Team Weblog at:
“For Windows Mobile 5.0, the “current” release, the User-Agent header that the browser sends across is one of the following two strings:
- Mozilla/4.0 (compatible; MSIE 4.01; Windows CE; PPC; 240×320)
- Mozilla/4.0 (compatible; MSIE 4.01; Windows CE; Smartphone; 176×220)
Moving forward, here’s the new IE Mobile User-Agent string:
- Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile m.n)
If you want to detect the current/older IE Mobile browsers, the way to do it is to look for “PPC” or “Smartphone“, as well as “Windows CE” in that string. That’s the only sure-fire way to be certain of what you’re getting.
If you want to detect the new browsers coming out, just look for the string “IEMobile” as part of the User-Agent header. Since the capabilities of the Pocket PC and Smartphone versions of the browser are identical, and they’re built from the identical code base, there’s no reason to differentiate them any more. “