I heard you cannot downgrade to 4.3 to 4.1.2.
But, is it possible to change it down altogether to CM10?

Reason: The new 4.3 update runs terrible on my phone. I sent it back to Samsung and my carrier both and tried to update with KIES, but it's not getting any better. Some minor lag disappeared after they performed a full reset and flash, but nothing huge change. It's still crap. The lock screen (which I see at least 50 times a day) is absolutely horrible. The battery life also gone crap, since the update, Google+ loves to eat battery. Deleted the updates, disabled the app, signed out, none of those helped. Google of course won't care since I'm just one sucker from the many people.

Sidenote: I know I won't be able to use Triangle Away (since KNOX) and such. But the phone is not usable anymore, it's a brick with a few hours of battery life. It's useless.

1 Answer 1


Yes, the reason you can't downgrade official ROMs is not a technical one; it's just a decision Samsung have taken.

There's no reason at all why you can't go backwards and forwards between versions of Cyanogenmod as long as you have the appropriate recovery. And CM10.1.3 and CM10.2 are currently much more stable than CM11 on the i9300.

Consult the Cyanogenmod site (http://www.cyanogenmod.org/) or XDA-Developers (http://forum.xda-developers.com/showthread.php?t=2382573) for full details before actually flashing a new recovery. (Personally I'm staying with CM10.1.3 (http://forum.xda-developers.com/showthread.php?t=2035141) as I found the camera unstable on CM10.2)

  • After spending hours again with the issue, the drain disappeared. (not sure if it's just a temporary effect.) Anyway. The lock screen/encryption is still terrible, so CM10, here I go. I will give it a try when I get home. At least I can try out a Sony if I brick this phone... heh.
    – Apache
    Commented Jan 27, 2014 at 10:46
  • Samsung's firmware is awful - you're well rid of it. It's a shame they won't share the Exynos docs with the CM team, but there you go.
    – user5506
    Commented Jan 28, 2014 at 22:37
  • The install went smooth and I love this thing, but the mobile network got awful now. I've got only 2G now at best. It's flaky, etc. I'll make a thread on a forum (just don't know which one I'm supposed to go.)
    – Apache
    Commented Jan 29, 2014 at 10:44

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