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Home/ How-to guides/ Phones/ Apple/ iPhone 17/ Messaging & calls/ Reduce calls from unknown numbers

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Your deviceiPhone 17

Step 1 of 425%

01What to do now

Open Phone

Open the Phone app.

A carefully recreated iOS screen for iPhone 17, based on the manufacturer's current guidance. The highlighted control shows exactly what to use next. A software update may move it slightly.

Checked against Apple Support

Official screenshots are used when the manufacturer publishes them. Any additional visual is carefully recreated from the current menu. Instructions are based on Apple Support guidance for reduce calls from unknown numbers , checked 8 August 2026.

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