Apple's mobile phone text message was sent out, but others could not receive it.

This is caused by the wrong number setting of SMS center, and the modification method is as follows:

First, click the "Phone" icon on the mobile phone desktop, as shown in the figure below.

2. After entering the dialing interface, enter * 5005 * 7672 *+86 "SIM card SMS center number" #, as shown in the figure.

3. Then click the icon to make a call, as shown in the figure below.

Fourth, the mobile phone will set the number of the SMS service center, as shown in the figure below.