How to Fix Phone Overheating (Android & iPhone)
Why Your Phone Is Overheating
I've diagnosed hundreds of overheating phones over the years, and the first thing I tell every person: your phone getting warm is completely normal. Your phone getting hot , too hot to hold comfortably, hot enough to trigger an automatic shutdown warning, or hot enough that the screen dims on its own , that's a problem that needs your attention.
The line between "warm" and "dangerously hot" matters. A phone running at 35–40°C (95–104°F) during heavy gaming or video streaming is doing its job. A phone sitting idle on your desk at 45°C+ (113°F+) is telling you something is wrong.
So what actually causes phone overheating? There are more culprits than most people expect.
The processor is working too hard. Your phone's SoC (system-on-chip), whether that's a Snapdragon 8 Gen 3, Apple A18 Pro, or MediaTek Dimensity, generates significant heat under heavy CPU or GPU load. Running 4K video recording, playing graphics-intensive games, or rendering large files will push the chip to its thermal limits. That's expected. What isn't expected is your processor maxing out while your phone is sitting in your pocket doing "nothing", which usually means a runaway background app or process is hammering the CPU without your knowledge.
Charging issues are a major contributor. Fast charging generates heat as a byproduct of the rapid power transfer. But if your phone is overheating specifically while charging, especially with a third-party or damaged cable, that's a different and more serious problem. A failing battery can also generate excessive heat during charge cycles, and at worst, this is a lithium-ion safety issue you shouldn't ignore.
Ambient temperature and case trapping. Your phone dissipates heat through its chassis. A thick silicone or rubber case acts as insulation, trapping that heat instead of letting it escape. Combine that with direct sunlight or leaving your phone on a car dashboard in summer, and temperatures can spike dangerously fast.
Software bugs, malware, and rogue apps. I've seen a single poorly coded app, often a social media client with a broken push notification loop, keep the CPU at 80–90% utilization indefinitely. Malware and crypto-mining software does the same thing, intentionally. These are among the hardest causes to spot because the heat happens even when your screen is off.
Hardware degradation. As lithium-ion batteries age past 80% health, their internal resistance increases. More energy is wasted as heat during charging and discharging. A two-year-old phone that "suddenly" starts overheating often has a battery that was silently degrading the whole time.
The frustrating part is that phones don't tell you why they're hot. You get a vague "Device is warm" toast notification, maybe an automatic performance throttle, and that's it. This guide fixes that. Browse all mobile fix guides →
The Quick Fix, Try This First
Before you go deep into diagnostics, try this. It resolves the overheating problem in roughly 60% of cases I see, and it takes less than three minutes.
Step 1: Get your phone out of its case immediately. Peel off the case and set the phone on a flat, cool surface, not fabric, which insulates. A hard desk or countertop is ideal. Give it five minutes. You'll often feel the temperature drop noticeably. If your phone was borderline-too-hot and it cools down completely within five minutes once the case is removed, your case is the problem. Not all cases are created equal, thin, hard plastic cases with cutouts allow airflow; thick rubber armor cases do not.
Step 2: Force-close all apps. On Android, tap the recent apps button (the square or three-line icon at the bottom) and swipe away every single app. Then go to Settings → Battery → Battery Usage and look at what's consuming power in the last 24 hours. Anything above 20% that isn't "Screen" deserves scrutiny. On iPhone, swipe up from the home bar (or double-tap the Home button on older models) to open the App Switcher, then swipe every app card upward to close it.
Step 3: Toggle airplane mode for 60 seconds. Pull down your notification shade and enable Airplane Mode. This kills Wi-Fi, cellular, and Bluetooth simultaneously. If your phone cools down noticeably within a minute, you likely have a connectivity loop, a background app that was hammering the radio trying to establish a network connection. This happens a lot after a carrier update or a buggy app update.
Step 4: Restart the phone. A full restart flushes RAM, kills all background processes, and resets any software state that might be causing runaway CPU usage. Hold the power button, tap Restart (not just Power Off, a cold start is more thorough). After it boots, check the temperature again before opening any apps.
If after doing all four of those steps your phone is still getting hot within ten minutes of normal use, move on to the full step-by-step solution below.
This is the diagnostic step most guides skip, and it's the most important one. You need to find the source before you can fix it.
On Android: Go to Settings → Battery → Battery Usage. Some manufacturers hide more detail here, on Samsung One UI, tap the three-dot menu in the top right and select Show Full Device Usage to reveal system processes alongside apps. On stock Android (Pixel phones), you'll see a breakdown by app automatically. Look for any single app consuming an unusually high percentage over the past few hours.
For a deeper look, enable Developer Options (go to Settings → About Phone and tap Build Number seven times). Then go to Settings → Developer Options → Running Services to see every process currently active in memory and how much RAM each one is consuming.
On iPhone: Go to Settings → Battery and scroll down to the battery usage by app over the last 24 hours and last 10 days. Tap Show Activity to toggle between battery percentage used and the time the app spent active, including background activity. An app showing high battery usage with high background time is your prime suspect.
Write down the top two or three apps. You'll want this information for Step 2. If you see an app you don't recognize, especially anything that looks like a system utility you didn't install, that's a red flag for potentially unwanted software.
If the battery stats show that the Android OS or Android System itself is the top consumer, that points toward either a failed system update, a corrupted cache partition, or a rogue system-level service, all of which we'll address in the advanced section.
Once you've identified your top suspect from Step 1, take action on it. Don't just close it, that's a temporary fix. You need to either restrict it, update it, or remove it entirely.
Restrict background activity on Android: Go to Settings → Apps → [App Name] → Battery. You'll see options including Unrestricted, Optimized, and Restricted. Set it to Restricted. This prevents the app from running background processes when you're not actively using it. On newer Android versions with App Standby Buckets, this effectively moves the app into the "rare" bucket so the system barely wakes it.
Restrict background app refresh on iPhone: Go to Settings → General → Background App Refresh. You can disable it globally, set it to Off, or toggle individual apps. I recommend leaving it off globally and only enabling it for the few apps that genuinely need it, like navigation or messaging.
Check for a pending update: Open the App Store or Google Play Store and check if the offending app has a recent update available. Developers patch battery and CPU bugs fairly regularly once users start reporting them. Installing the latest version sometimes resolves overheating tied to that app overnight.
When in doubt, uninstall and reinstall: A corrupted local app cache can cause an app to loop and hammer the CPU indefinitely. Uninstalling completely clears that cache in a way that "Clear Cache" alone sometimes doesn't. Reinstall fresh from the store after the phone has cooled down.
After making changes, monitor the temperature for 30 minutes during normal use. If the phone stays cool, you've found and fixed your culprit.
If your phone overheats primarily while charging, or if it's an older phone that overheats during everyday tasks that never used to cause problems, the battery is very likely involved.
Check battery health on iPhone: Go to Settings → Battery → Battery Health & Charging. Your Maximum Capacity percentage tells you how much of the original battery capacity remains. Apple considers anything below 80% as degraded. Below 79%, the phone may have already enabled Performance Management (the old throttling feature) automatically. If you're seeing a red-flag recommendation or a service message on this screen, your battery needs replacing.
Check battery health on Android: This varies by manufacturer. On Samsung, dial *#0228# in the Phone app to open the Battery Status screen, which shows voltage and temperature. On Pixel phones running Android 14+, go to Settings → Battery → Battery health. For other Android phones, an app like AccuBattery can measure real capacity versus design capacity over time and give you a health percentage.
Inspect your charging cable and adapter: A frayed cable, a third-party charger not certified for your phone's fast-charging protocol, or using your phone's charger with a different phone's cable, any of these can cause charging inefficiency that manifests as heat. Always use the manufacturer's original cable and adapter, or a certified (MFi for iPhone, or USB-IF certified for USB-C) replacement.
Stop using your phone while fast charging. When you charge at 65W, 100W, or beyond, the SoC and power management IC are already working hard managing that power flow. Adding CPU load on top, playing games, watching 4K video, compounds the heat generation dramatically. If you must use the phone while charging, switch to a slower 5W or 10W charger.
Outdated operating system software is an underappreciated cause of phone overheating. OS updates frequently include thermal management improvements, scheduler patches, and fixes for specific SoC power efficiency bugs. Running an older OS version can mean your phone's processor is working less efficiently than it was designed to, burning more energy (as heat) for the same work.
Update Android: Go to Settings → System → System Update (the exact path varies by manufacturer, on Samsung it's Settings → Software Update → Download and Install). If an update is available, install it. Make sure you're on Wi-Fi and at least 50% battery before starting.
Update iPhone: Go to Settings → General → Software Update. Download and install any pending iOS or iPadOS update. If you've been delaying an update because of concerns about slowdowns, check the release notes, Apple frequently releases point updates (like 17.4.1 → 17.5) specifically targeting battery and thermal bugs.
Clear the cache partition on Android (does not delete personal data): On most Android phones, you can wipe the system cache partition through recovery mode. Power the phone completely off. Then hold the combination to enter recovery, this varies by device:
Samsung: Power + Volume Up + Bixby (or Home) button
Pixel: Power + Volume Down, then navigate to Recovery Mode
OnePlus: Power + Volume Up
In recovery, navigate to Wipe cache partition using the volume buttons, confirm with the power button, then reboot. This clears temporary system files that can accumulate and cause inefficiencies without touching any of your apps, photos, or personal data. It's one of the cleanest and safest fixes in the Android toolkit.
After updating and clearing the cache, restart the phone and observe temperature over the next 24 hours of normal use.
If you've done everything above and your phone is still chronically overheating, it's time to consider two more serious interventions: a malware scan and, if necessary, a factory reset.
Run a malware scan on Android: Google Play Protect is built-in and scans installed apps automatically. Open the Google Play Store, tap your profile picture in the top right, select Play Protect, and tap Scan. For a deeper scan, a reputable third-party option like Malwarebytes for Android (free version is sufficient) can catch threats Play Protect misses, particularly crypto-mining malware that hides in seemingly legitimate utility apps.
Signs your phone has crypto-mining malware: CPU usage is high even with no apps visibly open, battery drains in hours instead of a full day, the phone runs hot whenever it has internet access, and data usage is abnormally high for your usage pattern. These are the classic fingerprints of an unauthorized mining operation running on your device.
Factory reset, when nothing else works: A factory reset returns the phone to its out-of-box software state. It deletes everything. Back up photos to Google Photos or iCloud, export your contacts, and make note of any app-specific data you want to save before proceeding.
On Android: Settings → System → Reset options → Erase all data (factory reset).
On iPhone: Settings → General → Transfer or Reset iPhone → Erase All Content and Settings.
After the reset, set up the phone fresh, do not restore from a backup immediately. Use it for a day as a "clean" device. If it no longer overheats, the problem was software-based and the reset fixed it. Then selectively restore your data and reinstall apps one at a time, monitoring temperature after each batch, to identify which app was the culprit.
Advanced Troubleshooting
The steps above fix the vast majority of phone overheating problems. But if you're still dealing with chronic heat after all of that, or if you're a power user who wants precise diagnostics, these advanced approaches go deeper.
Use ADB to analyze CPU and thermal data (Android): Android Debug Bridge gives you direct access to the system's thermal sensors. Enable Developer Options and USB Debugging (Settings → Developer Options → USB Debugging), connect to a PC, and run:
adb shell dumpsys battery
adb shell dumpsys cpuinfo
adb shell cat /sys/class/thermal/thermal_zone*/temp
The first command shows current battery temperature in tenths of a degree Celsius (so "320" = 32.0°C). The second shows CPU usage per process, anything with a consistently high percentage is your suspect. The third command reads all thermal sensor zones directly from the kernel, you'll get readings for the CPU, battery, skin temperature sensor, and sometimes GPU and modem separately.
Analyze thermal throttling events: When your phone gets too hot, the SoC governor steps down the CPU clock speed to reduce heat, this is called thermal throttling. You can observe it happening in real time using CPU-Z (Android) or GPU Benchmark apps that report live clock speeds. If your Snapdragon 8 Gen 3's prime core is supposed to run at 3.3GHz but you're seeing it stuck at 1.8GHz during a benchmark, thermal throttling is actively engaged. Sustained throttling means the device's passive cooling (the graphite sheets and copper vapor chambers inside) can no longer keep up with the workload or ambient conditions.
Inspect for physical damage: A swollen battery is a hardware emergency. Lay your phone flat on a table and spin it, if it spins freely on the middle of the back panel, the battery has expanded and is physically pushing outward. This requires immediate battery replacement and you should stop charging the phone until it's fixed. A swollen lithium-ion battery generates enormous heat and is a genuine fire hazard.
Network and modem heat: In areas with poor cellular signal, your modem amplifies its transmission power to maintain a connection, this generates heat and hammers the battery simultaneously. If your phone runs unusually hot in low-signal areas (basements, rural areas, certain buildings), that's the modem working overtime. The fix here is practical: enable Wi-Fi calling when indoors, or use Airplane Mode and Wi-Fi only when you don't need cellular.
Enterprise and MDM-enrolled devices: If your phone is managed by a corporate Mobile Device Management (MDM) system, you enrolled it with your company IT team, MDM policies can require constant background sync, location reporting, and compliance checking that contributes to CPU and radio activity. Check with your IT department about whether device monitoring policies can be adjusted. Don't attempt to remove an MDM profile without IT authorization; it may violate your company policy and could lock you out of corporate resources.
Prevention & Best Practices
Once you've fixed the immediate overheating problem, a few habits will keep it from coming back. I've watched people go through this exact troubleshooting cycle every three months because they never changed their usage patterns. Don't be that person.
Choose your case wisely. That thick military-grade rubber case looks great, but it's essentially a thermal blanket for your phone. If you have a phone with a glass back (which acts as a natural heat radiator), a heavy case defeats the entire passive cooling design. For everyday use, go with a thin hard case, 1–2mm polycarbonate is the sweet spot between protection and heat dissipation. If you're doing something heat-intensive like a long video recording session, take the case off entirely.
Manage your screen brightness and always-on features. Your display is one of the largest heat generators in the phone, especially OLED panels at high brightness with always-on display enabled. Dropping screen brightness from 100% to 60–70% in indoor environments significantly reduces both heat and battery consumption. Disable Always-On Display if you don't genuinely need it.
Be deliberate about where you leave your phone. Never leave it on a car dashboard in direct sunlight, interior car temperatures can exceed 60°C (140°F) on a hot day, far beyond what any phone's thermal design can handle. Apple's official operating range for iPhone is 0°C to 35°C (32°F to 95°F) for use. Samsung's Galaxy flagships share the same spec. Keep your phone in the shade, in a bag, or in an air-conditioned space during hot weather.
Keep your OS and apps updated. Make it a habit to install system updates within a week of release and enable automatic app updates in the background. The majority of thermal improvement patches come through regular updates, you get them for free just by staying current.
Monitor battery health annually. Check battery health once a year (iPhone: Settings → Battery Health; Android: via AccuBattery or manufacturer diagnostic). If you're below 80% capacity, budget for a battery replacement. A fresh battery in a two-year-old phone often feels like getting a new device, better thermal performance, longer daily battery life, and faster charging without excessive heat.
- Switch to a thin polycarbonate case and remove it during gaming or video recording sessions
- Enable Optimized Charging (iPhone) or Adaptive Charging (Android) to reduce battery wear from overnight charging
- Set display brightness to auto-adaptive and disable Always-On Display if your phone runs warm
- Audit your installed apps every three months, uninstall anything you haven't opened in 30 days
Frequently Asked Questions
Is it normal for my phone to get hot while charging?
Some warmth during charging is completely normal, particularly with fast chargers, 65W, 80W, or higher. The charging circuitry and battery generate heat as a byproduct of rapid power transfer. What isn't normal is the phone getting uncomfortably hot, shutting down, or the area around the charging port getting significantly hotter than the rest of the device. That can indicate a damaged charging port, a bad cable, or a battery that's reached the end of its life. To reduce charging heat day-to-day, enable your phone's Optimized or Scheduled Charging feature so it charges slowly overnight and only hits 100% right before you wake up.
Why does my phone overheat when I play games but nothing else?
Mobile gaming simultaneously maxes out three of the biggest heat generators in your phone: the CPU, GPU, and display. Compound that with a thick case blocking heat dissipation, and you've got a recipe for thermal throttling within 20–30 minutes of intense play. This is especially common with games like Genshin Impact, PUBG Mobile, and Call of Duty Mobile, which are engineered to push mobile hardware to its limits. Lower the in-game graphics settings to Medium, the visual difference is modest, but the thermal difference is dramatic. Also check whether the game has a built-in frame rate limiter and cap it at 60fps rather than 90 or 120. Many phones also have a dedicated Game Mode or Performance Mode that adjusts the thermal profile for gaming.
My phone overheats and the battery drains super fast, are these related?
Almost always, yes. Heat and battery drain go hand in hand because they share the same root causes: high CPU activity, aggressive background app behavior, failing battery, or a rogue process keeping the system awake. When your battery's internal resistance increases due to aging or damage, it converts more electrical energy into heat instead of useful power, so you get worse battery life and more heat simultaneously. Running through the steps in this guide, identifying CPU-hungry apps, checking battery health, and updating your OS, typically improves both symptoms at the same time because you're treating the underlying cause rather than two separate problems.
Can phone overheating cause permanent damage?
Yes, sustained high temperatures are genuinely damaging to smartphone hardware. Lithium-ion batteries degrade faster at high temperatures; research shows that prolonged exposure above 45°C can double the rate of battery capacity loss. The SoC (processor) can suffer electromigration damage over time from sustained thermal stress, though modern phones' thermal throttling is specifically designed to prevent this by reducing clock speeds before temperatures reach dangerous levels. The most immediate risk is your battery, repeated high-heat cycles accelerate aging, so a phone that overheats regularly will see its battery health drop to 80% or below much sooner than normal. If your phone is routinely hitting 45°C+ in daily use, treat it as a serious issue, not a minor inconvenience.
Why does my phone overheat in the summer but not in winter?
Your phone's thermal design assumes ambient room temperature, roughly 20–25°C (68–77°F). When ambient temperature is already 30–35°C in summer, your phone has much less thermal headroom before it hits its limits. It's simple thermodynamics: the phone can only shed heat to its environment, and when that environment is itself hot, the transfer slows dramatically. Direct sunlight is the worst offender, the sun can heat the phone's surface directly regardless of ambient air temperature. Keep it in the shade, use a light-colored case (which reflects rather than absorbs radiant heat), and avoid using the camera app outdoors for extended periods on hot days, since the image sensor and processing generate significant heat.
I did a factory reset and my phone still overheats, what now?
If a factory reset didn't fix it, the problem is almost certainly hardware, not software. The most likely culprits at this point are a degraded or failing battery, a damaged charging port causing inefficient power draw, or, in rare cases, a hardware fault with the SoC or power management IC itself. Start by getting the battery replaced by a certified repair shop or through the manufacturer's service program. A fresh battery fixes the problem in the majority of post-reset cases. If the phone is still overheating after a battery replacement, contact your manufacturer's support for a device inspection. If the phone is under warranty, a factory-reset + persistent overheating + no software explanation is a strong case for a warranty repair or replacement.