The Galaxy A25 5G uses an Exynos 1280 chip, a 120 Hz Super AMOLED screen and a 5,000 mAh battery, and the heat reports from owners cluster around three situations: charging, gaming and long spells of weak mobile signal. A phone that is warm while charging is normal; one too hot to hold is not, and it has usually been asked to do two things at once, such as charge at 25 W while it is in a case on a bed.
Repair guides advise turning off fast charging in Settings, Battery, Charging, charging with the phone idle, and lowering the motion smoothness from 120 Hz to the standard 60 Hz, which cuts the load on the chip. A weak signal makes the radio work harder and heat the phone, so changing the network mode or using Wi-Fi at home can help. If it is hot with the screen off, look for a runaway app.
Differential
Likely causes of “Samsung Galaxy A25 5G gets hot or shows a temperature warning”, and how to tell them apart
- 1
Fast charging in a case
What separates it The phone is hot after an hour of charging
How to confirm Charge idle, remove the case and turn off fast charging in the battery settings
- 2
The 120 Hz refresh rate and a bright screen
What separates it The phone warms during video and games
How to confirm Set Motion smoothness to Standard, and lower the brightness
- 3
A weak mobile signal
What separates it The phone is warm with little use in a poor-coverage spot
How to confirm Use Wi-Fi, or set the network mode to LTE for a while
- 4
A runaway app
What separates it Heat with the screen off
How to confirm Settings, Battery and device care, Battery, look for an app with high background use
- 5
A worn battery or a fault
What separates it Heat that persists after the steps above
How to confirm Contact Samsung or an authorized repairer
Before you touch a setting
Record this first — changing settings destroys the evidence
- When the heat occurs: charging, gaming, idle or signal-poor
- The case and charger in use
- The refresh-rate and charging settings
- Whether the phone is hot with the screen off
Try in this order
0 of 6 completedUnplug and let it cool
ReversibleRemove the case, put the phone on a hard surface in the shade and let it cool before you do anything else.
Lower the motion smoothness
ReversibleOpen Settings, Display, Motion smoothness and choose Standard, which runs the screen at 60 Hz and lightens the chip's load.
Turn off fast charging for a test
ReversibleIn Settings, Battery and device care, Battery, Charging settings, switch off Fast charging and charge idle to see whether the heat falls.
Find any heavy app
ReversibleOpen Settings, Battery and device care, Battery and look at which apps used the most in the background.
Check the signal
ReversibleIf the heat comes with bars of weak signal, move to Wi-Fi or switch the network mode temporarily.
Update the software
ReversibleInstall the latest One UI and security update from Settings, Software update, because Samsung's updates adjust heat and charging behavior.
Model-specific
What is true of this model and not of its siblings
- The chip
- The Exynos 1280 is a mid-range chip that throttles itself when hot, so a hot A25 also feels slow.
- Charging speed
- Samsung rates the A25 for 25 W charging, but the charger is not in the box, so check what you are using.
- A reboot
- A restart clears runaway processes and often cools a hot phone for a day or two.
Stop boundary
When this stops being a self-service repair
- !If it is hot on a clean boot with no apps, contact Samsung
- !If the battery swells or the case bulges, stop using it
- !If it overheats on a genuine charger, ask for a battery check
Evidence ledger
Sources behind this answer
Charging, gaming and multitasking heat causes with the settings to change.
General Samsung heat fixes for charging, apps and the case.
Specifications: 5,000 mAh battery, 25 W charging, Exynos 1280, 6.5-inch 120 Hz Super AMOLED.
Exact questions
Common questions
Why does my Galaxy A25 get hot while charging?+
Fast charging and a case trap heat; charge idle and uncovered.
Does the 120 Hz screen cause heat?+
It adds load; Standard 60 Hz runs cooler.
Can weak signal heat the phone?+
Yes, the radio works harder.
Is a warm phone normal?+
Mild warmth is, a hot phone is not.