An overheating phone paired with a flood of pop-up ads is one of the clearest combinations pointing to adware. When malicious apps run constantly in the background to serve ads or harvest data, the processor works overtime, and that extra load generates heat even when you’re not actively using the device. Here’s how to confirm the cause and clear it out.
Confirming Adware Is the Culprit
Before diving into removal, it helps to recognize the specific pattern adware creates, since overheating alone can have several other causes.
- Overheating with no clear cause — heat building up while the phone is idle or barely in use, rather than during gaming or video streaming
- Full-screen pop-up ads — appearing even when no app is actively open
- Fast battery drain — paired with the overheating, since background processes consume power continuously
- Unfamiliar apps or icons — new apps you don’t remember installing showing up on the home screen or app list
- Spike in mobile data usage — a sign malicious apps are transmitting data to remote servers in the background
- Sluggish performance or random app crashes — a symptom of something else competing heavily for the phone’s resources
If your phone overheats for no clear reason and the battery is draining unusually fast, treating it as a likely malware or adware issue is the right move, since this is one of the only causes that requires software-level intervention rather than a hardware fix.
Step 1: Boot Into Safe Mode
Safe Mode is a restrictive boot state that disables all third-party apps, including whatever is causing the adware activity, while keeping native system functions running.
- Press and hold the power button until the Power menu appears
- Long-press the “Power off” option
- Select “Safe Mode” when the confirmation dialog appears
- The phone will restart with “Safe Mode” displayed in the bottom corner
On some Samsung Galaxy models, this process differs slightly — if the long-press method doesn’t trigger the Safe Mode prompt, restart the phone and hold Volume Down as the Samsung logo appears instead.
If the pop-ups and overheating disappear once you’re in Safe Mode, that’s a strong confirmation the problem is a third-party app rather than a deeper system issue, and it’s removable without a full factory reset.
Step 2: Identify and Remove the Suspicious App
While still in Safe Mode, since the adware can’t run or defend itself in this state, go through the installed apps list.
- Open Settings and navigate to Apps
- Look for anything unfamiliar, recently installed, or with a generic/suspicious name
- Tap the app and select Uninstall
If the Uninstall button appears grayed out, the app has likely granted itself Device Administrator privileges as a way to resist removal. In that case, go to Settings > Security > Device Admin Apps, revoke the suspicious app’s admin access first, then return to uninstall it normally.
Step 3: Run a Dedicated Malware Scan
Google Play Protect scans apps automatically in the background, but it’s built primarily to catch threats from apps distributed through the Play Store — sideloaded APKs, browser-injected adware, and more deeply embedded threats can slip past it. Running a second, specialized scanner closes that gap.
- Briefly disable Airplane Mode to get internet access
- Download a reputable mobile security app, such as MalwareFox, Bitdefender, or AVAST, from the Google Play Store
- Open the app and update its threat definitions before scanning
- Run a full scan of the device
- Review the results — the scanner will typically categorize each detected threat as adware, trojan, or spyware
- Remove everything flagged
If the scan flags something more serious than adware, like a banking trojan or spyware, treat that as more urgent, since those categories often mean login credentials or personal data may already be compromised, and changing account passwords afterward becomes an important next step.
Step 4: Clear Browser Cache and Cookies
A lot of adware and malicious redirects arrive through the browser via shady websites rather than a standalone app. Clearing cached data can stop those sites from continuing to function on your device.
- Open Chrome (or your default browser) and tap the three-dot menu
- Select “Delete browsing data,” then “More options”
- Set the time range to “All time”
- Untick “Browsing history” if you want to keep it, but leave “Cookies and site data” and “Cached images and files” checked
- Tap “Delete data”
Note this will log you out of most websites, so you’ll need to sign back in afterward.
Step 5: Update Your Phone’s Security Patch
Monthly Android security patches close vulnerabilities that adware and malware exploit to gain access in the first place — a single monthly patch has been known to fix well over 100 vulnerabilities at once. Checking Settings > System > Software Update and installing any pending security patch helps prevent reinfection going forward.
Step 6: Restart Normally and Monitor
Once the suspicious apps are removed and the scan comes back clean, restart the phone out of Safe Mode. Keep an eye on temperature and battery behavior over the next day or two — if overheating and pop-ups don’t return, the adware has been successfully cleared. If symptoms persist despite following these steps, it may be worth backing up your data and considering a factory reset as a more thorough fix.
Join The Discussion
Adware-driven overheating is one of those problems that can feel alarming until you realize it’s usually a fixable software issue rather than a hardware failure. Have you dealt with an adware infection causing your phone to overheat, and did a particular scanner or removal step end up doing the trick? Share your experiences, questions, or tips below, especially if you’ve found a security app that’s worked reliably for you.
