How to turn off the iMessage displayed under the phone when making a phone call?

Click the Settings icon on the desktop.

Open General and select Access Restrictions.

Click "Enable Access Restriction", enter the password and turn off the switch.

Back to the main screen, the dialing icon will be displayed.

How to activate iMessage:

Open the settings page, turn down the page, find the information bar, and open it directly.

At this time, you can see it at the top of the page in the open information setting page. At this time, iMessage is in the unopened state. Click the switch on the right to turn it on.

After it was opened, it was basically activated successfully. Because sometimes the signal is not very good or weak when using mobile data, using iMessage may be unsuccessful, and some users will choose to send it by SMS. However, it should be noted that there is a charge for SMS, which should be charged according to the operator's standards.