Collection for the Great God Guide How to make "mobile browser" input "www url" automatically jump "mobile version" page!

Collection Ask the great God how to make "mobile browser" input "www url" automatically jump "mobile version" Page!!
Find out how to make your phone browser enter the WWW URL to automatically jump to the mobile version of the page

For example, the mobile browser input www.sina.com.cn, the browser will automatically jump into the 3g.sina.com.cn, seek guidance source code, such as online!!

------Solution--------------------
Determine the client Agent
Determine your ISP
Determine the client's ability to support certain phone features (via JS, etc.)
......

But can tell you none of the above is accurate, it is better to make a button to let customers choose

BTW: Two years ago, I used x64 Firefox (PC) to access Sina home page, always automatically jump to the WAP version, has not returned the settings, so I think Sina is very rubbish, about one months after the correction ...
------Solution--------------------
Or do a number of users to choose the function of it!! The default is the PC version!! Judging the browser logo is also a good way!!

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