Review

[suneesh07]

After using Samsung M21 for one year, my phone started freezing and restarting automatically continuously. 

I guess, I'm not the only one who's facing these issue. 

[gm21]

Try resetting it, it may help

But usually and unfortunately all these problems indicate towards motherboard issue. Please visit samsung service center. Hopefully if it's just within your warranty they may help you without any cost

[suneesh07]

Unfortunately my warranty period is expired.😪
I guess this is happening to most of the m series users.
Samsung should sort this out

[Albatross33]

I'm also facing this same issue in M21, due to security patch update issue, service centre staff informed me to change motherboard for this issue it cost around 5500, eventhough I filed a complaint in forum, but they told ur mobile is out of warranty u need to pay that amount. Most of M series and A series users facing this problem.

[prashantpophale]

That is the point,
As soon as warranty period over ,these problems start.
It's hardware problems.

[surenparvataneni]

I'm also facing the same issue

[cs-member13]

Dear Samsung member,

Greetings from Samsung customer support.

Thank you for sharing your concern. We acknowledge your query and apologize for the same. And please follow the easy troubleshooting steps which might help to solve the issue.
Kindly use a genuine Samsung charger.

Note: We always recommend using a genuine Samsung charger for charging your device.
There are two methods to disable the auto-restart function
Method 1

Please follow the below steps:
Step1: Navigate to the app's screen and tap on Settings.
Step2: Tap on General management.
Step3: Tap on Reset.
Step4: Disable Auto restart (if enabled).
Step5: Auto-restart disabled.

Please follow the below steps:
Step1: Go to "Settings"
Step2: Tap on "Battery and device care"
Step3: Tap on Three dots
Step4: Tap on "Automation"
Step5: Disable "Auto-restart at set times" if enabled

In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback >Error report).

Thank you for writing to Samsung.
Warm regard,
Samsung customer support