Why didn't Apple receive the text message?

This is caused by your address book being synchronized on iCloud, which can be solved by the following methods: In the settings, iCloud closes the address book by steps. Both devices are turned off, and then the address book is restored. If there is no backup, there is no choice but to manually enter the phone number again.

The Solution of Untrusted Apple Mobile Phone

We use Apple's IOS9 or above system. When we install some new software, we learn to display "untrusted enterprise developers" when we open it.

At this time, we click the settings icon to open the mobile phone desktop.

After entering, find and open the general options.

Then open the interface, go to the profile option, and click Open.

Then click to open the corresponding option for untrusted software developers just displayed. If you don't know which one it is, click to open one by one.

After entering, click the blue trust ... option.

Then click the trust button in the pop-up window, and the problem can be solved successfully. Let's go back to the phone desktop and open the app just now.