How does iphone6 completely erase and delete short messages?

First enter the iPhone6 desktop interface, then find and click enter information. In the iPhone6 SMS interface, click Edit in the upper left corner.

Secondly, next, we check the messages that need to be deleted. If messages need to be deleted in batches, check multiple messages that need to be deleted at the same time. When finished, click Delete in the lower right corner to delete all messages in batches.