Jul 16, 2013
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how i done this i do not know
problem is i rerooted my ace 2 and installed s3 firmware so it was running on gingerbread and not jellybean problem is my fone keeps freezing now and every app becomes unresponsive its doing my head in and im close to smashing it off a wall how do i restore it back to the original settings and firmware of ace 2 jellybean? xxxxxx :(
 
Can you flash the original firmware with Odin?

I've very limited knowledge of Samsung phones, buy if you get the firmware from Samsfirmware (I'll link when I get home), you should be able to restore it back to normal.
 
*I can't really understand or imagine how you managed to flash any firmware from the S3 onto the Ace 2 without bricking your phone ???

*The original firmware for the Ace 2 is in fact "Ginger Bread". And only recently Samsung started the rollout of "Jelly Bean" to this device.

Any way...
*My advice to you is to boot your phone in recovery mode and perform a factory reset and clean the partition.
*After that test your phone to see if the problem is fixed?
If the problem persists?
*Than my advice to you is to connect your device to your pc and use "Kies" to check if you have any firmware update.
If not than follow the instructions in the link below to flash Jelly Bean.
Here the link:
http://androidforums.com/showthread.php?p=5750102