How do iPhone4S and iPhone5 search for deleted messages?

Recently, it is widely rumored on the Internet that iPhone4S and iPhone5 can search and delete short messages. How does iPhone search for deleted messages? The search function of the iphone5 sliding to the left can actually be powerful enough to search for deleted text messages. This has caused a lot of discussion among netizens and users. Some people say they can find the text message from two months ago, while others say they can't find it at all. What's the truth?

As far as the latest iOS 6 system is concerned, this statement is "certainly" reasonable. Let's explain it to you through actual tests:

Deleted messages can be found by this method, but there are two prerequisites:

After deleting the SMS, the IPhone has not been restarted.

After deleting the short message, the "Information" background program never quit.

In this way, you can indeed search for deleted messages by swiping left. And the bigger premise is that you need to know which words are included in this deleted short message. The simple understanding is: iPhone search can find these cached information that has not been deleted in time. On the other hand, it is impossible to open the deleted mail even if it has been found. Click to enter the information interface, but you can't view the deleted messages.