Smartphones

They are likely held in a database file, and once deleted, are like any other deleted text - nearly unrecoverable. You will likely not get them back with this tool.

If you have something like a protected recycle bin, (like Norton's), this will have kept that data until purged. Otherwise, get a low-level disk editor or forensic recovery software and prepare for eyestrain. Be extremely careful, and you likely want to leave such a tool in read-only mode unless and until write mode is necessary to retrieve data.

However, if you have been using this system at all since you have deleted the messages, especially if SMS has been in use, the data is likely long gone.

none !

Their cheating remains mystery.