Seems you can't enter data with the masked edit on Android phones. Not sure the Android browser version but it's latest generation HTC One phone, as well as iPhones and others.
Just merged #245 which fixes things on my Galaxy S4. Can you try out the current version in master and report back if that fixes things for you? https://raw.githubusercontent.com/digitalBush/jquery.maskedinput/master/dist/jquery.maskedinput.min.js
Sorry for the long delay getting back. I just updated the version in the framework to check if the fix worked and it didn't. My current work around with the released 1.3.1 version that came with the Yii framework was to Remove the placeholder -
My Mask is '99999-999', (Brazil Postal code)
Character Map '[0-9]'
And Place holder of '' (empty string)
This allows entry of data, to be entered, but is a bit funny as the '-' will move as the user types. If the placeholder is a single space ' ' then entry is not possible. Again this might be user error here but the same behavior exists. Hopefully I got the current commits, I just pulled from the master commits and now just only was thinking that that might not be the current dev branch...
On my Galaxy S4, it works with the Swype keyboard, but gets weird with the stock Samsung keyboard. Still searching for a good solution.