Where are SMSs stored on an Android device?

SMSs and MMSs are stored in:

data/data/com.android.providers.telephony/databases/mmssms.db

At least on my devide.

To find it, launch a file explorer (ES FIle Explorer in mycase) on a Rooted device. Then search for the file mmssms.db …

It’s an SQLite Format 3 file…

More on this:

http://developer.android.com/reference/android/telephony/SmsManager.html#STATUS_ON_ICC_READ