User manual

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7.2.2. Customize message settings
The Messages settings menu lets you control options for your text and MMS
messages including message limits, displays, notifications, and more. Go to
[Settings] >[System Apps] > [Messages].
Block messages. Click [Block] > [Block Messages]. Enter the keywords for
spam messages. To block all unknown messages, toggle the slider to green.
Note: When Block all unknown messages is turned on, you might miss
important verification text messages, as well as messages from people who
you know, but are not on your contact list.