Thanks for reaching out to us in order to find out about tone.xml files on your beloved Samsung Galaxy phone.
XML stands for eXtensible Markup Language, which is a way of describing data using a text-based document. Because XML is extensible and very flexible, it's used for many different things, including defining the UI layout of Android apps. Be very careful not to delete them as these files are associated to other files/apps.
Should you need further assistance and guidance, you may contact us via our Samsung Customer Care support channels below.
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