Hello, first of all my phone details are:

Phone-Details
Android-Version: 2.3.6
Name: Samsung Galaxy Ace 2
Model: GT-I1860
Buildnumber: GINGERBREAD.XXLI2
Kernel-Version: 2.6.35.7-I8160XXLD8-CL1100997 se.infra@SEI-28 #2 SMP PREEMPT Tue Apr 24 05:35:29 KST 2012
Rooted: Yes

and what I'd like to do is updating the firmware to the latest possible version (eventually 4.1.2)
(I would like to keep root-access)

What I tried is:
* Updating the firmware by the normal update-notification of my phone
* Updating the firmware by the normal update-notification of my phone after a hard reset

Maybe some of these things work (if so, please also explain how):
* Resetting root, installing the firmware update, rooting again (idk how)
* Updating the firmware via PC (using a firmware from: live.samsung-updates DOT com/index.php?device=GT-I8160) (idk how / which tools to use for this)

----

It would be great if you could help me out with this. I haven't found any truly useable post on how to achieve this.

 

Thanks!

 

Ok, well I solved it. Here's what worked:
After hard reset and SuperSU's unroot I connected the phone to my PC. Then with Kies (samsung.com/de/support/usefulsoftware/KIES/) I was able to update the Firmware to 4.1.2.

After doings so I could root again using this tutorial: ibtimes.co.uk/galaxy-ace2-root-official-android412-i8160xxmf2-jellybean-491401

First time I tried to update the Firmware with Kies it didn't work (as far as I recall it didn't show an error message either).
Please set this thread to solved and/or closed if possible.