I mean that the SMS application, and its inbox, and the string `"content://sms/inbox"` are not part of the Android SDK. Please do not use them from an SDK application. If you are modifying the firmware for distribution on your own phones, that is fine, but I rather doubt that is what the OP is seeking to do. http://www.androidguys.com/2009/12/14/code-pollution-reaching-past-the-sdk/