How to modify the default program for sending SMS?

(1) Open the settings, select Apply, enter the installed program management, and find the name of the program you open by default, which contains the default value. Please select the opening method. The address book DEFY contains two programs that can manage short messages.

(2) If this method doesn't work, then you can uninstall the address book software, reinstall it, set the menu key-Privacy, restore the factory settings, and then you can modify it.

It is also possible that the installation of other software led to the modification of this project. The reason is found, and the solution is simple, that is, go back to English or traditional Chinese environment, because at this time, in simplified Chinese environment, you can't enter the application and reinstall the address book.