Suddenly appearing advertisements on the lock screen, pop-up banners in work applications or intrusive notifications can turn using a modern smartphone into a nightmare. This problem affects millions of users around the world, turning a powerful Android device into a source of constant irritation. Most often, the culprits are free utilities that monetize their work precisely by displaying aggressive content, or malicious software secretly installed on the system.
Fortunately, in most cases, flashing the device or complex technical manipulations are not required. There are proven methods that allow you to block unwanted content at the system, browser and specific application levels. In this article, we will look in detail at how to identify the source of the problem and get rid of annoying banners forever, using built-in security features and third-party tools.
Diagnostics of the source of advertising and hidden threats
The first step before taking active action should be to identify the culprit. Ads may appear due to a specific installed application that you downloaded recently, or they may be a result of subscribing to spam notifications in your browser. Carefully analyze at what point the banners appear: immediately after unlocking the screen, when starting a certain game, or randomly at any time?
If suspicious windows pop up on top of other apps, most likely an adware virus is active in the system. Go to your phone settings and open the adware - advertising virus. Go to your phone settings and open the section Applications → All applicationssection. Carefully review the list for apps without an icon, with an empty name, or those that you did not knowingly install. Malware is often disguised as system utilities with names like “System Update” or “Flash Player”.
It is also worth checking the rights to display on top of other windows. This is a critical security setting that is often ignored by users. Go to Settings → Accessibility → Display on top of other applications. If you see unknown apps here or simple utilities (like a flashlight or calculator) that have this permission enabled, disable it immediately. It is this feature that allows advertising to cover the entire screen.
⚠️ Attention: If you cannot find the application in the list or the “Delete” button is inactive, the malware may have acquired device administrator rights. In this case, go to
Settings → Security → Device Administratorsand uncheck the suspicious element before deleting.
For a more in-depth analysis, it is recommended to use specialized anti-virus scanners, such as Malwarebytes or Dr.Web Light. They are capable of detecting hidden miners and Trojans that are not visible in the standard task manager. Regular scanning helps keep the system clean and prevents re-infection.
Blocking ads by setting up a private DNS
One of the most effective and safest ways to remove advertising without installing additional apps is to change the DNS (Domain Name System) settings. This method works at the network connection level, blocking requests to known ad servers before the content is downloaded to your device. The "Private DNS" function is available on all smartphones running Android 9 and higher.
To activate protection, open the phone settings and find the section Connections or Network and Internet. Depending on the model of your smartphone (Samsung, Xiaomi, Pixel), the item may be called differently, but the essence remains the same. Select the "Private DNS" option and switch the mode from "Auto" to "DNS Provider Hostname".
In the field that appears, you must enter the address of a reliable blocker. The most popular and proven solution is the AdGuard service. Enter the following line in the input field:
dns.adguard.comSave changes. Now all your phone's DNS queries will go through AdGuard's filters, which filter out domains known to be sources of ads and trackers. This method does not require root access and has virtually no effect on Internet speed, while effectively clearing traffic in browsers and most applications.
If, after enabling private DNS, some sites stop loading or applications display network errors, try temporarily disabling the function. Sometimes children's sites or specific services may be blocked by mistake.
It is worth noting that this method does not block advertising within video hosting sites (for example, YouTube) or advertising that is built directly into the application code and downloaded from the same domain as useful content. However, for general cleaning of the system from banners in news feeds and websites, this solution is ideal.
Disable intrusive notifications in the Chrome browser
Often users confuse viral activity with allowed notifications from sites. When visiting various resources, we often accidentally click the "Allow" button when asked to show notifications. As a result, messages about “winnings”, “viruses” or hot news, which are actually disguised advertisements, begin to appear on the lock screen.
To fix the situation in the most popular browser, open Google Chrome and click on the three dots in the upper right corner. Go to Settings → Notifications. You'll see a list of all the sites you've given permission to display messages. Study it carefully and look for suspicious domains with strange names.
Click on such a site and select the "Block" option or completely remove the permission. This menu also has a useful “Use notifications” feature, which can be completely disabled if you do not want to receive notifications from any web resources at all. This is radical, but guaranteed to get rid of spam.
| Notification type | Signs of spam | Action |
|---|---|---|
| News aggregators | Clickbait headlines, celebrity photos | Block site |
| System warnings | "Your phone is infected","Refresh the battery" | Delete immediately |
| Stores and coupons | Discount offers from unknown brands | Clear cache and block |
| Game portals | Advertising new games every 15 minutes | Disable notifications |
In addition to Chrome, a similar check should be carried out in other browsers, if you use them, for example, in Opera or Firefox. The mechanics of sending push notifications are the same for all web browsers, so the principle of clearing permission lists will be identical.
☑️ Checking the browser for spam
Cleaning the system from advertising applications
If the previous methods did not help, the problem lies deeper - in the installed applications. Many free apps, especially utilities for saving battery, cleaning memory, QR code scanners or simple games, contain aggressive advertising modules. They can show full-screen banners even when you are not using the application itself.
Remember after installing which app the problem started. Go to Settings → Applications and sort the list by installation date. Remove any recent apps that are in doubt. Pay special attention to apps that you downloaded not from the official store Google Play, but from third-party sites or forums.
There is a tricky way to identify an application that shows ads in the background. When an advertising banner (appears) on the screen, do not close it immediately. Press the "Recent applications" button (square or swipe up from bottom and hold). In the list of open windows you will see which application is currently active. Often this will be a app with an empty name or icon that disguises itself as a system process.
⚠️ Attention: Some malicious applications may hide and not appear in the general list. If you find such a app in the recent tasks window, but cannot find it in the settings, try booting your phone to Safe Mode. To do this, you usually need to hold down the power button on the screen, and then hold down the “Turn off” item for a long time until the corresponding prompt appears.
In Safe Mode, only system applications are loaded. If the advertisement disappears, then the culprit is definitely among the software you installed. Uninstall apps one at a time, rebooting your phone to normal mode after each uninstall until the problem goes away.
What to do if the application is not uninstalled?
If the "Delete" button is inactive, check your administrator rights. Go to Settings → Security → Device Administrators. Uncheck the suspicious application, then try to remove it again through the standard application menu.
Setting up personalization and advertising ID
Even if you have removed explicit advertising, the Android system still collects data about your interests to display targeted ads in official Google services. These are not viruses, but a legal part of the ecosystem, which, however, can be disabled to increase privacy and reduce the amount of personalized spam.
Go to your phone settings and find the section Google. In the services menu, select Advertising. Here you will see an option to "Remove Advertising ID" or "Reset Advertising ID". Clicking this button resets the accumulated profile of your interests, and advertising networks will begin to show you random ads instead of those tailored to your search queries.
Also in this menu there is a switch “Disable ad personalization”. Activate it. This won't eliminate ads completely (you'll still see banners), but they will become less relevant and generally less intrusive as the algorithms stop aggressively tracking your online behavior.
It's also worth checking the content personalization settings in the smartphone interface itself. Manufacturers like Xiaomi, Samsung or Huawei often integrate their own advertising services into system applications (calculator, explorer, theme). Go to the settings of each such application and look for checkboxes like “Get recommendations” or “Personalized content”, disabling them.
Resetting the advertising identifier does not remove advertising completely, but makes it less intrusive and stops collecting data about your interests for targeting.
Using specialized blockers
If the built-in tools are not enough, specialized blocking applications come to the rescue. Unlike the DNS method, they work locally on the device, creating a local VPN tunnel to filter traffic. This allows you to block ads not only in the browser, but also inside other applications and games.
One of the leaders in this niche is the application AdGuard. It offers an advanced filter that blocks trackers, analytics counters, and malicious sites. To install, download the APK file from the official website of the developer, since on Google Play versions of such apps are often cut down due to store policies.
After installation and providing the necessary permissions, the blocker will start working in the background. You can customize filter lists by adding specific rules for Russian or foreign resources. It is important to ensure that the filter databases are updated so that the protection remains relevant against new ad networks.
There are alternatives, such as Blokada or DNS66. They work on a similar principle, but may have a different interface or set of functions. The choice of a specific tool depends on your needs: for some, maximum performance is important, and for others, fine-tuning of blocking rules.
⚠️ Attention: When using local VPN blockers, conflicts may arise with other applications that use VPN (for example, corporate clients or some instant messengers). Only one VPN profile can work at a time.
Do not install several blockers at the same time. This will lead to a conflict of network interfaces, rapid battery drain and possible Internet disruptions. Choose one reliable solution.
Frequently asked questions (FAQ)
Is it safe to use free ad blockers?
It is safe to use proven open source blockers or from well-known developers (for example, AdGuard). However, downloading dubious "anti-virus" apps from unverified sources can lead to the opposite effect - infecting the device. Always check the app's reputation before installing.
Why do ads appear even after a factory reset?
If ads come back after a Factory Reset, you may be automatically restoring a backup that already had an infected app. It could also be due to a malicious profile in the browser or Google account synchronization that restores problematic settings. It is recommended to set up the phone as new, without restoring the application backup.
Is it possible to remove advertising on YouTube without a Premium subscription?
Officially - no. It is impossible to remove ads inside the YouTube application using built-in Android tools. This requires modified versions of the client (for example, YouTube ReVanced), the installation of which requires certain technical skills and carries security risks, since this is unofficial software.
Does blocking ads affect the speed of the phone?
On the contrary, blocking ads often speeds up the smartphone and saves traffic. Pages load faster because the browser does not need to download heavy banners and video inserts. However, the operation of the blocker itself (especially the DNS or VPN type) consumes a small percentage of processor and battery resources.
What to do if ads pop up on the lock screen?
This is almost always a sign of a malicious application. Go to your notification settings and see which app has permission to show notifications on your lock screen. Most often these are browsers or “cleaners”. Deny them this access or remove the application completely.