Why you need to install Stock rom :
Some time you need to fix some thing with your device , Like Rooting your device , when you install custom rom or custom recovery , And it cause a harm to your device , Or you want to downgrade from a higher version of your system to Stock one ,
Prerequisites :
You have to backup your data first like contacts , calls , massages , apps ,
1-You have installed your Ace 4 USB drivers on your PC (
Find it here ).
2-You need to enable USB debugging mode which is deactivated by default. (you can skip it ) 3-Your Ace 4 should have 70-80% charge remaining.
4-Your Ace 4 should be factory unlocked. (for locked phone, flash carrier firmware to stay on warranty)
5-Backup your important data like Call logs, SMS and other data stored in phone memory in case if anything goes wrong, your data is not hurt. 6-Make sure that kies program is not running & disable antivirus.
Downloads :
1.You must download all necessary file.(Samsung USB driver or Smart Switch and Odin)
2.Then you must install all driver or Samsung smart switch to your computer or PC.
3.Extraxt Odin V3.10.6. file on the destination folder.
4.Download Stock rom file
5.Switch Off your Ace 4 to start flashing process.
6.Then, you must run Odin3 v3.10.6 by right click on Odin.exe and select Run as Administrator.
7.When program is running, now you can click AP, and navigate to the *.tar or *.tar.md5 firmware file.
8.Now your firmware file has been inserted in Odin3
9.Then, Enter download mode your Ace 4
http://rooter15.blogspot.com/2016/02/download-mode-for-samsung-galaxy-ace-4.html
10.Connect your Ace 4 to PC
or laptop With USB
11.Start downloading and wait until it's says it's done