I desided to enter Download mode on my device just out of curiosity. I entered it, saw it (didn't transfer or try to download anything) and I went on exiting. But... I used a wrong key combination - isntead of Volume DOWN and start buttons, I tried with Volume UP and start button. Nothing happened, at least the menu's appearance didn't change. I realised I was using the wrong combination and did it right the second time. The phone turned off and then on and everything seems to be ok. My question is - could I have done something to the software just by trying to exit Download mode with the wrong key combination? I fill very much appreciate it if someone can give me a clue.
@Antoanet Whilst you should not have problems best to read up on it if not familiar. See some information here https://www.samsungsfour.com/tutorials/how-to-enter-exit-download-mode-on-galaxy-s10-s10e-s10-plus.h...
Going in an out dowload mode does nothing don't worry.
Download mode is a separe component of the OS which allows you to flash software via ODIN to install updates or repair a failed OS. (updating via ODIN is not supported by samsung and voids your warranty if the assistance guy discovers you did that).