How to delete iphone SMS at one time

Is the iPhone used upstairs? The new information is in the upper right corner! There is no way to delete multiple contacts, unless you delete the computer, download the synchronization assistant (better for personal use) or pp assistant, 9 1 panda assistant from the computer, and then there are some options on the left. After you go in, you can do it yourself ... In addition, ios7beta5 already supports deleting all contacts with one click.