Samsung Galaxy overheating? 7 things to check

By Saadat Rafiq · 2 min read · 7 steps · Updated 5 October 2026 · ▶ Video demo

Device

Android

Shown on

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

App

Settings

Real screenshots

5 of 7 steps

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 53% of the memory in use.

   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, Download and install. Updates fix apps and system parts that run too hard. Ours was on One UI 8.5.

   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

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.

The screenshots are from a Samsung Galaxy A57 5G with One UI 8.5 and Android 16. Other Galaxy phones on One UI 8 use the same menus; on older One UI versions a few names and positions differ. We only looked at these screens on our phone and changed nothing.

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.