It would be great to be able to delete all conversations except for a few that I specify I'd like to keep. I can think of at least three approaches to this:

1. "Delete all unpinned" menu option on the conversation screen. That would allow me to "pin to top" the conversations I want to keep, and then delete everything else in one operation.

2. A "select all" control on the "Delete multiple" screen. That would allow me to select all conversations to delete, and then un-check the ones I want to keep.

3. A configuration option to make "Delete all" go the "Delete multiple" screen, only with all boxes pre-checked, instead of doing what it now does. Again, that would allow me to simply un-check the conversations I want to keep.

This would be really convenient for me, and I can't be the only one. I use text messaging for basically two purposes: to communicate with a select small group of people, primarily my wife; and to receive automated notifications of various events and emails that are important in my work. These automated-notification texts tend to just pile up on my conversation list, so I'll typically have about 30 to 40 of them, plus one conversation with my wife. I'd really like to have an easy way to keep the conversation with my wife and get rid of all the other junk, so that's why I'm suggesting this.