Samsung Galaxy A71 keeps self-restarting multiple times and turning aeroplane mode on by itself

[Cezi11]

My phone keeps restarting multiple times by itself, sometimes not even allowing me to unlock my phone. Usually, after restarting 3 or 4 times in succession, it turns on aeroplane mode by itself. When I turn it off without using my phone, it usually turns off in a minute or two. If I use data straight after turning plane mode off, it will restart immediately. Also, I decided to turn aeroplane mode off while watching a video on instagram, and my phone froze but the video's audio was stuck in a loop, like 'ah-ah-ah-ah-ah', pretty fast.

I don't know if this has anything to do with, but my data usage is currently at 13.6GB. My WiFi does this weird thing where it kicks my phone off, so I sometimes use my mobile data without noticing.

Another thing, I did not download any apps or anything. I'm just at a loss as to what it could be, because it was very sudden.

[BandOfBrothers]

Hi @Cezi11 

I can appreciate how this must be frustrating for you. 

May I suggest the following troubleshooting steps. 

• Ensure all your apps in the Playstore and Galaxy Store are updated.
• Ensure your phone's software is updated. 
• Clear Cache Files from the phone's System Partition Section  > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to insert your earphones or hook upto a powered On Laptop or use a Tv's USB Port to access the Clear Partition Section. This may help with lag or stutters as this clears the phone of old/unused or broken cache files.There is also a Repair Apps option in the Menu System too. 
• Safe Mode  > https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/ turns off downloaded apps and themes etc which may highlight an app or theme that's causing conflict. 
• As a last resort back up and factory reset. 
• A Samsung Service Centre can assess your phone. 

If I can be of any further help then please don't hesitate. Take care.  😎