Install Oreo on already rooted phone

[hdim]

I am an 80 year old newbie. Much to my surprise I successfully managed to root my Samsung Galaxy S3 and install Nougat

My question: is it possible to install Oreo on this already rooted phone or must I start the rooting process all over again?

 

[Hadron]

Is there an Oreo custom ROM for the S3? If so you can install that in the same way that you installed Nougat (since I'm guessing that was also a custom ROM): back up your apps and data, go into your custom recovery, back up your old ROM (in case the new one doesn't work), factory reset (to clear data that will not be compatible with the new ROM), install new ROM, reboot, restore your apps and data.

Technically rooting is modifying the ROM to allow you to grant admin privileges to apps, and the custom recovery is separate (though usually installed as part of the process). Once you have a custom recovery you can use that to install new ROMs without having to do anything else (and custom ROMs are almost always rooted already).

Of course the first question is most important: has anyone built an Oreo ROM for the S3? There's no generic OS that can be installed, it has to be built for the device, so it's only possible if someone has done that.

 

[hdim]

Is there an Oreo custom ROM for the S3? If so you can install that in the same way that you installed Nougat (since I'm guessing that was also a custom ROM): back up your apps and data, go into your custom recovery, back up your old ROM (in case the new one doesn't work), factory reset (to clear data that will not be compatible with the new ROM), install new ROM, reboot, restore your apps and data.

Technically rooting is modifying the ROM to allow you to grant admin privileges to apps, and the custom recovery is separate (though usually installed as part of the process). Once you have a custom recovery you can use that to install new ROMs without having to do anything else (and custom ROMs are almost always rooted already).

Of course the first question is most important: has anyone built an Oreo ROM for the S3? There's no generic OS that can be installed, it has to be built for the device, so it's only possible if someone has done that.

Thank you Hadron. I really appreciate your helpful and not too technical reply. I have searched for Oreo but cannot really understand answers. I hope that another forum member maybe knows a link

 

[Hadron]

I've had a quick look at xda-developers and can't see any evidence of an Oreo ROM for the S3 existing (for any version of the S3, though from the fact that you are posting at this time I assume you are not in the US or Canada and so it's most likely the "international" version you have).

There was one thread about Lineage 15, which is an Oreo ROM, but when I read it it was just a few people saying "Anyone done this?", "Yes, that would be a great idea, but I don't know how", "Me neither, hopefully someone will" and nothing else.

 

[hdim]

Again my thanks Hadron. It is really kind of you to help a geriatric newbie.
Perhaps I should take up gardening rather than playing with things I don't understand!
Yes I am in UK and phone is GT 19300
Best hdim

 

[Hadron]

Oh, I'd say that getting Nougat running on a 2012 phone is pretty good going .

The thing is that with mobile phones the operating system always has to be built for the device. So getting Oreo on it will need someone who knows what they are doing to build it for that model, assuming that there are compatible drivers for the various bits and pieces of the phone. That requires both knowledge and time, so for most people (and this definitely includes me) it's a matter of seeing whether anybody else has done it.

I'd keep an eye on it: the S3 clearly still has an active development community, more so than many more recent devices, so it's possible that someone will do this. I just don't see any sign at the moment that it has been done so far.

 

[hdim]

I shall keep an eye open too Hadron, now I know what to look for
Over and out