If you have activated the use of iMessage, you may have received a message from a contact that you do not have in your agenda. If it is a mistake on the part of the other person, we may not care but if it is SPAM, it may become something really annoying.
If you would like to limit the use of iMessage only to people you have in your calendar, you have to perform the following steps:
- Enter the Settings menu of your iOS device (iPhone, iPad, iPod Touch).
- Access the Notifications section.
- Locate the notifications destined for the Messages app
- Navigate to the bottom of the page and in the "Show iMessage alerts from:" section, select the option "Only my contacts".
With these simple steps you will prevent messages from unknown people from reaching you. I emphasize that this iOS trick only works for iMessage, therefore, if someone unknown sends us an SMS, we will receive it normally.
If you want to know others iOS related tricks, Stop by the tutorial section in which you will find a lot of useful information related to the operating system that gives life to the iPhone, iPad and iPod Touch.
More information - Tutorials and manuals on iOS and iPhone
Source - iMore
Thank you very much