ATT S20 firmware upgrade package

[TAJourney]

I've been reading up on using Odin to upgrade my Samsung which is stuck with an old OS, and I'm comfortable (I think) with that. However, I have a question regarding which firmware package I should use.

My ATT Samsung S20 is outside of the US and ATT's service, so it’s never received updates. It has one of the older Android 10 March 2020 updates currently installed. The most current firmware updates are for Android 12. Can I download the most recent Android 12 update and directly flash my old Android 10 to this one? Or, do I need to do this incrementally, by first flashing to the most recent Android 11 update available, then flashing to the most recent Android 12?
Thanks for the advice

 

[mustang7757]

Frija has superseded Samfirm

 

[TAJourney]

Sorry Mustang, about to flash and I have one last question.
Confused about the CSC file. you say
"CSC USE HOME CSC FIILE TO SAVE DATA /THIS ONLY GOING BETWEEN CARRIER FIRMWARE OR IF YOUR ON UNLOCKED GOING BETWEEN UNLOCKED FIRMWARE"

Last I time did this I don't recall having to reinstall data and I think, if I have an ATT unlocked and using TMB I "am going between carrier firmware".
Does this mean I use the HOME_CSC_OYN.... file?
Or,
Do I leave it empty when you mention, "Home slot don't do anything"

 

[mustang7757]

Sorry Mustang, about to flash and I have one last question.
Confused about the CSC file. you say
"CSC USE HOME CSC FIILE TO SAVE DATA /THIS ONLY GOING BETWEEN CARRIER FIRMWARE OR IF YOUR ON UNLOCKED GOING BETWEEN UNLOCKED FIRMWARE"

Last I time did this I don't recall having to reinstall data and I think, if I have an ATT unlocked and using TMB I "am going between carrier firmware".
Does this mean I use the HOME_CSC_OYN.... file?
Or,
Do I leave it empty when you mention, "Home slot don't do anything"

You can use Home CSC file in odin slot CSC either way

 

[mustang7757]

Yes home slot in Odin leave empty

 

[TAJourney]

You can use Home CSC file in odin slot CSC either way

But it's HOME_CSC that leaves all my data on phone, correct?

and, not sure what you mean by "Yes home slot in Odin leave empty" I don't see a home slot

 

[mustang7757]

Home CSC keeps from factory reset
Last slot in odin is home user leave it blank