Samsung Galaxy overheating? 7 things to check

howtosimply.com/guides/samsung-galaxy-overheating-7-things-to-check/ · Checked October 2026 · Samsung Galaxy A57 5G (SM-A576B), One UI 8.5, Android 16

5 of 7 steps with real screenshots · 2 official sources below

Device

Android

Shown on

Samsung Galaxy A57 5G (SM-A576B), One UI 8.5, Android 16

App

Settings

Real screenshots

5 of 7 steps

What we did

Observed: looked at each screen, changed nothing

Our phone

Shown on Galaxy A57, One UI 8.5

Checked

October 2026

Sources

2 official, linked below

Step by step

1. 

   Close what is running

   Open Settings, Device care and tap Optimize now. It closes background apps and frees memory. Our phone showed Good, with 58% of the memory in use.

   Watch these steps Done

2. 

   Know what One UI 8.5 offers

   On our A57, the Performance section of Device care only has Auto optimization. There is no Performance profile or Processing speed setting to turn down.

   Done

3. Take the case off while charging

   A thick case holds heat in. Charge on a hard surface, not on a bed or sofa, and out of direct sun.

   Done

4. 

   Lower the brightness

   A bright screen is one of the biggest heat sources. Drag the slider down, or switch on Adaptive brightness so the phone dims itself.

   Done

5. 

   Turn on Power saving

   Settings, Battery, Power saving limits background activity, which also cuts heat.

   Done

6. 

   Install software updates

   Settings, Software update, then tap Check for updates. Updates fix apps and system parts that run too hard. Ours was on One UI 8.5 when we took these step pictures, and it updated to One UI 9.0 on 16 Oct 2026.

   Done

7. Still hot when idle? Get it checked

   If the phone is hot while doing nothing, or the back swells, stop charging it and take it to a Samsung service centre. A failing battery can cause both.

   Done

Watch these steps

If you do not see this option

• Your Galaxy runs One UI 9. Device care has no Optimize now button. On our Galaxy A57 after the One UI 9.0 update, the top card said Great! and that 7 apps were put in deep sleep because they weren't being used. Storage and Memory are listed below it, and Auto optimization further down.

  

• You never see a temperature warning Samsung says the overheating warning is only on supported models, and its wording may vary by model. Source: Why is my Samsung phone overheating or getting hot
• The warning says Cooling down Samsung lists the messages as Cooling down, "Your device is overheating. It will now power off to cool down" and "It powered off to prevent damage". The wording may vary by model. Source: Keep your Galaxy device at its normal operating temperature

If this does not work

• It got hot after setup or an update Samsung lists the first setup, moving data from an old phone, and system updates among the causes of a warm phone. Source: Keep your Galaxy device at its normal operating temperature
• It heats up on a wireless charger Samsung says to remove anything metal or magnetic between the phone and the charger, such as cards in a case, and to try a Samsung-approved charger and cable. Sources: Keep your Galaxy device at its normal operating temperature, Why is my Samsung phone overheating or getting hot
• It switched itself off Samsung says a second warning means the phone turns off to cool down. Do not use it again until it has cooled. Source: Why is my Samsung phone overheating or getting hot

About this guide

Samsung says a Galaxy warms up during heavy use and fast charging, and protects itself when it gets too hot by slowing down, dimming the screen or pausing charging. The checks below find the cause when it happens without a reason.

Good to know

When the phone shows a temperature warning, unplug it, close the apps and leave it in a cool place until the warning clears.

Battery draining fast as well? Samsung Galaxy battery draining fast? 6 fixes.

In short: Device care, Optimize now; case off while charging; lower brightness; Power saving; software update; get it checked if hot while idle.

📷 See real photos from the Galaxy A57 in our Camera Lab, next to 10 other phones.