Many days ago I started a similar discussion, my A50 goes to lock screen continously when I'm using it, and sometimes it wakes up when I don't touch it. I first thought it was due to heating problem, and no, it isn't.
The real reason I found out is when I was switching airplane mode several times, and the bug is recreated.
This bug happens only when I'm at work or my wifi is down, the signals at my workplace is very weak, meaning that my phone will be online and offline several times every day, and when my wifi is down, I have to switch to mobile data, and the moment that I turn off wifi, it goes to lock screen.
By turning on and off airplane mode will be similar to be driving on a highway with weak mobile connection. And yes, I did it right in my home and the phone goes to lock screen each time I turn off airplane mode.
This is annoying because the phone is taking over control of me, it locks my phone, I unlocked it l, 5 seconds later it locks again. I know it sounds like some recently happened accident. But for real, I need a fix please (Dont tell me to turn on airplane mode forever or quit my job thanks).
There is another customer facing same issue in this link https://www.google.com/url?sa=i&source=web&cd=&ved=2ahUKEwj0joKe5bDjAhVDrVkKHeVGDAAQzPwBegQIARAC&url...
Can you please provide us with the model code for your device?
Thank you so much for reaching out! This forum is for support of US products and customers. As your product is a non-US model and support for these models is very limited, please seek a support team for your area. You can do so by using this link: http://www.samsung.com/visitcountry Thanks! *Zell