The problem of English characters in Window8 tablet keyboard

The problem of Chinese characters in Window8 tablet keyboard
An app developed, several test accounts can be logged in on PC client and webpage, but some accounts return on Win8 tablet and “Account or password is incorrect” ;, and sometimes correct.
Multiple input, & ldquo; ensure & rdquo; (hehe, because I really did not guarantee to live, I will know later) User name and password are not entered incorrectly.
The first reaction is that there is a problem with the server returning results, but why is the PC and the web page always good, and the same account on the tablet is sometimes correct?
Then running the simulator debugging finally found the key.
For example, for an account “[email protected]” displayed on the tablet is "[email protected]".
I saw it, it is two different at. ⊙ _ ⊙ b Khan
Why there is no problem on the pc, because the Chinese and English input state on the pc keyboard is at @. But the win8 tablet can be different in Chinese and English.
To enter the English at, you need to switch to the English input method first.

(This is not a problem with the program, there is a problem with the user input ——(*^__^*) 嘻嘻…… Microsoft's keyboard is a bit boring