Meizu M8 Clear All SMS

In the New UI, is there any way to delete all the SMS at once without having to format all other data too?

I havn't seen a quick way. but i think the quickest way is to hit "select"
and then check al boxes, and then hit "Delete"

OK, I've found a way to do this:

1. On the M8, go to the Documents app and go to the Documents and Settings folder.
2. Delete the sms.db file
3. Restart phone