Rolling back to default o.s.

[Rafiq]

Is there a way to get back to the default os without resetting to factory settings.
Updated system no good to me.
Thanks

[awesomeness]

Unfortunately, it's not possible to go back to an old OS from a new one. But I must say, I wish it could be possible. I think you MIGHT be able to if you were to root your phone, or something along those lines. But I'm not very skilled in that sense. @shaggyskunk1 is though.

[GabyThe911Operator]

If you want to rolling back to Android 8, you need to download the appropriate BL, AP, CP, and CSC

But for more information about it

Contact an Expert members like @Shaggyskunk1 @CHMultimedia @Echo1

[dmflash]

contact a phone repair shop, it will probably cost a few bucks but likely be worth the cost compared to bricking your phone and getting a decent firmware back.

[CHMultimedia]

There is no need to pay anyone to do that. Rolling back to Oreo is very simple and very much risk-free.

Let's start with the beginning. What device are you using?

[dmflash]

I'm using a note 8

[Shaggyskunk1BLM]

The "default o.s." is One UI for the Samsung devices which have been updated to One UI...
If you are talking about wanting to go back to Oreo - Then you have to download the Samsung Firmware - for Oreo for your Device & Carrier & Samsung USB Drivers - as well as Odin 3.13.1 to your computer.
You then need to Install Odin & the Samsung USB Drivers & Extract the Samsung Oreo Firmware - Boot into Download Mode and Flash the Samsung Oreo Firmware with Odin 3.13.1.... There's obviously some fine points that you need to know & how to Flash 🐧

[Neverendy]

I dont care what software or what memory or any of that. I just want to escape the hackers that use my phone. This has been going on for a year now. So in other words if I go to f. reset my phone won't work

[Neverendy]

btw. this is the only device I own