I received my S21 on Monday and transferred all data from my S8 + via SmartSwitch. I immediately noticed concerns of overheating for no reason (during light use) and a battery that drains abnormally quickly. Even restoring it to factory settings, the problem persisted. So I had it returned via my reseller who provided me with a new one. I did not restore my old S8 + settings but only photos, videos and music via Smartswitch on PC. My current S21 heats up rather less than the other (but there is still this problem) and the battery seems to go down much faster than what I read on the internet (almost 10 hours on 60Hz). I see my percentages dropping almost per minute ... So I optimized the battery as much as possible which I find abhorrent to pay for such an expensive smartphone and not be able to take advantage of its great features and that's it... the problematic. I hesitate between getting a refund for acquiring a Pixel 5 that would match the current configuration of my S21 with a much longer battery life or waiting in the hope of a miraculous patch with the risk of losing my refund possibility.
I would just like to have opinions because I always had Samsung phones but, there, it makes me a little afraid to bet on a possible patch.
Thank you for your answers, even if we should do a fresh start it is still unacceptable that it provokes this kind of reaction (for the price of the phone even if it is a new series, it happens to me twice in a row !) , and it is true that by having just transferred my media the overheating is reduced but the battery remains a problem. I am going to ask for a refund and get me a Huawei P30 Pro 2020 rather than the Pixel 5 and S21, I think this is the wiser decision thanks again for your reviews !
A little disappointed with Samsung which does not communicate anything about this and does nothing to reassure customers.
I tried to get a refund as I said in my previous post but the reseller wouldn't take it and "wouldn't have been successful" in reaching Samsung tech service but customer service told him that 'They know the concern that it is enough to do a factory reset and avoid putting your previous Google account which could bring settings from old devices and therefore cause overheating and battery failure. That moreover a patch had been deployed and that it would be put directly after the reset. Of course, these were solutions that I had already tried and this new patch apparently does not exist, they are surely talking about the update of February 1 which does not concern these concerns. I have also had feedback from Samsung customer service that they are not aware of this issue and no one is complaining about it. I still tried resetting my phone for the umpteenth time and created a new google account to link it to (the settings at least) and I have to say that it is a little better almost no overheating and the battery seems to be draining less quickly even if the autonomy remains disappointing.
If anyone ever wants to try, to do a factory reset (having previously deleted the data from your accounts via the settings), just press the lock button and the volume down until the screen darkens then keep the lock button pressed, this time pressing the volume up button. You just have to navigate the menu with the volume buttons and validate with the lock button.