I have started facing 'Automatic reboot' issue, clearly its software issue that @SamsungIndia should aware of. And now my friend who is using M21 started facing the same issue and the device is just out of the warranty. There are lakhs of customers who are facing this issue. But still no official resolution from Samsung it clearly shows how they care their customers. This is their biggest failure after Note 7. I trusted you after that but now I have decided to move out of Samsung ecosystem.
I am sure there are lakhs of customer who take this decision and never come back to Samsung. Samsung's down fall just begun. Good bye!
SO NOT EVERYTHING HAS TO BE ASSOCIATED WITH "M sErIeS".
My main motive was to tell that "Not every problem has to be associated with M series". ( As he wrote M series- biggest failure after Note 7 )
My A51 also has Exynos 9611 but unlike most of the the A51 users I'm not facing boot loop & speaker not working issues.