Apple's SMS icon has been deleted. How to restore the software?

Step 1: Open [Application]-Check whether there is a SMS icon. If yes, long press to add to the desktop. As shown in the figure below:

Step 2: If the first method fails, you can restore the phone to the factory settings.

How to restore the factory settings: Open the phone Settings-General-Click Restore.

As shown in the figure below:

However, it must be noted that when the second method is implemented, the data in the mobile phone (SMS, contacts, downloaded applications, etc. ) must be prepared before you can restore the factory settings.

No matter any APP on the phone is accidentally deleted, it can be downloaded again in this way.