If you are looking to install custom firmwares on your Samsung Galaxy J1 Ace, you will have to install a custom recovery – something like TWRP or CWM. This particular one is for the SM-J110H variant of Samsung Galaxy J1 Ace and after its installation, you will have to install all J1 Ace specific hacks and even root it with ease.
Here are the instructions on how to install TWRP custom recovery on the Samsung Galaxy J1 Ace SM-J110H variant.
1. Download and install Odin on your PC.
2. Once you have Odin installed, download the proper .tar file for your device from the download link above.
3. Power off your device. Turn on your device using the proper key combo to get into download mode and attach the device to your computer via a USB cable
4. Use the PDA tab or button to browse to and select the tar file that you downloaded and flash the device.
Keep in mind that modern Samsung devices come with a key combo in order to prevent users from entering into recovery. For that, you will have to type in fastboot reboot into ADB and then hold the key combo and boot to TWRP. Once TWRP is booted, TWRP will patch the stock ROM to prevent the stock ROM from replacing TWRP. If you don’t follow this step, you will have to repeat the install.