If your brand new Samsung Galaxy S26 Ultra is getting uncomfortably warm, you're not alone. Early software bugs and some unique hardware features can cause it to run hotter than expected. I'd start by checking what you're doing when it heats up. Intense gaming, using the camera for long periods, or even the initial setup and app downloads can push the new Snapdragon chip.
Here are the most effective ways to cool it down and prevent future overheating.
Check Your Charger and Cable
Since the S26 Ultra doesn't come with a charger in the box, the one you're using matters a lot. For Super Fast Charging 3.0 (up to 60W), you need a compatible Samsung 60W charger and a high-quality USB-C cable. Using an old, slow, or damaged charger can cause the phone to heat up more during charging as it negotiates power delivery inefficiently.
If you're using wireless charging, make sure you're on a Qi2 or compatible Samsung wireless charger. Off-brand pads that don't align properly can generate excess heat. Also, remember that wireless charging naturally produces more heat than wired charging, so it's normal for the back to feel warm.
Close Demanding Apps and Games
The S26 Ultra is powerful, but running graphics-intensive games or multiple camera/video apps will heat it up. Swipe up from the bottom and hold to enter the recent apps view. Swipe away any apps you're not using, especially games, camera, or video streaming services.
You can also see which app is causing the issue. Go to Settings > Battery and device care > Battery. Tap on View details to see a graph of your battery usage and temperature. Below that, a list shows which apps have used the most battery recently, which often correlates with heat generation.
Turn Off Unnecessary Features Temporarily
When you notice the phone getting hot, try turning off features you don't immediately need. Pull down the quick settings panel twice and look for these toggles. Disabling 5G can reduce heat if you're in an area with a weak signal, as the modem works harder to maintain a connection.
Also consider turning off GPS/Location, Bluetooth, and Mobile Hotspot. The always-on display is another small contributor. Reducing the screen brightness manually can help too, as the massive, bright display is a significant source of heat.
Update Your Software
For a 2026 device, early software updates are crucial. Samsung frequently releases patches that optimize performance and fix bugs causing abnormal battery drain or overheating. Go to Settings > Software update and tap Download and install.
Make sure your apps are updated as well from the Galaxy Store and Google Play Store. Outdated apps, especially social media ones, can have bugs that cause high CPU usage in the background.
Clean the S Pen Slot and USB-C Port
This is a specific tip for the S26 Ultra. The S Pen slot runs right alongside the USB-C port at the bottom. Dust, lint, and debris from your pocket can get trapped in the S Pen slot and eventually migrate to the charging port.
A blocked USB-C port can cause a poor connection with your charger, leading to inefficient charging and heat. It can also trigger a false "moisture detected" warning. Gently clean both the S Pen slot and the USB-C port with a dry, soft-bristled brush or a can of compressed air held upright.
Adjust Your Battery Protection Settings
By default, the S26 Ultra has a feature called Battery Protection enabled. This limits your maximum charge to 85% to prolong the battery's lifespan. While great for long-term health, it means the phone is constantly managing charge cycles, which can sometimes contribute to warmth.
You can toggle this based on your needs. Go to Settings > Battery and device care > Battery > More battery settings. Here you can change Battery protection to "Basic" to charge to 100%. See if this makes a difference in daily heat.
Perform a Force Restart
If the phone feels hot and is also acting sluggish or unresponsive, a simple force restart can clear out any temporary software glitches. This won't delete any of your data. Press and hold the Volume Down button and the Side/Power button simultaneously for about 10 seconds.
Release the buttons when you see the Samsung logo appear on the screen. Let the phone reboot completely. This is often the fastest fix for random overheating caused by a background process that's stuck.
Check for Rogue Apps in Safe Mode
Booting into Safe Mode temporarily disables all third-party apps you've downloaded. If the phone runs cool in Safe Mode, you know a downloaded app is the culprit. To enter Safe Mode, press and hold the Side/Power button until the power menu appears.
Then, tap and hold the "Power off" icon on the screen until you see a prompt to reboot to Safe Mode. Tap it. Use the phone lightly in this mode for a while. If it doesn't overheat, restart normally to exit Safe Mode and start uninstalling recently downloaded apps one by one to find the problem.
Reset All Settings
If the overheating is persistent and you can't find a specific app causing it, a settings reset can help. This will revert all your system settings (like Wi-Fi passwords, Bluetooth connections, and display preferences) back to default without touching your personal data or apps.
Go to Settings > General management > Reset > Reset all settings. Enter your PIN if prompted and confirm. After the phone reboots, you'll need to reconfigure your preferences, but misconfigured settings that were causing the CPU to overwork will be cleared.
