How to quickly delete spam messages on iPhone?

There are too many websites registered and authorized. Our mobile phones often receive spam messages, and the iPhone does not provide the function of deleting messages with one click. How can I quickly delete previously useless messages?

In fact, solving this problem is very simple. As long as we set the time reasonably, we can solve it. The method is as follows:

Step 1: Open Settings-Information-Save Information.

Step 2: Change the information retention time to 30 days, and then click the Delete button.

Step 3: Set-General-Date and Time, turn off the automatic setting and adjust the time to 30 days later. At this time, all the messages were deleted.

Tips: To be on the safe side, we can adjust the time longer-more than 30 days.