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Download the stock ROM for the SM-J110G if you have that version. Download the stock ROM for the SM-J110F if you have that version. If you rooted your device with KingRoot then it does not trip Knox. If your device comes with Knox then the CF-Root tool does trip Knox. You are regaining your warranty by following this guide unless your rooting method tripped Knox. You must have the Developer Options turned on and the USB Debugging Mode enabled from inside the Developer Options menu. Download the Samsung USB Drivers for mobile phones from the official Samsung website or from the links we have hosted from our USB Driver page. A stock ROM can only be flashed on the corresponding model number or you will soft-brick the device.
You must follow this guide using the Samsung Galaxy J1 Ace smartphone with the model number SM-J110F and SM-J110G only. We have the latest guide for that running Android 4.4.4 operating systems.
You need to have rooted the Samsung Galaxy J1 Ace smartphone before following this guide. These are the instructions to unroot Samsung Galaxy J1 Ace smartphones using the Odin flash tool, your smartphone and a Windows computer.