How to block ads on a Samsung Galaxy (free, easy, no extra app)
This step-by-step tutorial will show you how to block ads on a Samsung Galaxy smartphone or tablet without using an additional ad-blocking app or browser extension.
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With this method, you also don't need to install an additional privacy-focused web browser with built-in ad-blocking features, such as Brave or Firefox. Instead, you can browse the Internet ad-free using the pre-installed Samsung Internet or Google Chrome browser by simply changing one setting.
How to block ads on a Samsung Galaxy
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Open settings.

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Open Connections or Network & internet.

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Tap on Private DNS. If you don't see the 'Private DNS' option, you may have to tap on More connection settings or Advanced.

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Tap on Private DNS provider hostname to enable this option.

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Enter dns.adguard.com in the 'Private DNS provider hostname' field.

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Tap Save.

Advertisements are now blocked across all web browsers on your Samsung Galaxy device.
Related:
How to use Private DNS on an Android phone or tablet
How to access blocked websites on an Android phone without VPN
How to set up DNS on any Android phone (step by step)