Samsung Galaxy J1 (SM-J100H) - ATO - J100HXXU0APB3 firmware
Samsung Galaxy J1 firmware J100HXXU0APB3 is the Android 4.4.4 build for the Samsung Galaxy J1 (model SM-J100H), released by Samsung for Open Austria (ATO). It was built on 19 February 2016, has changelist 951505. The package combines system build J100HXXU0APB3 (AP/PDA) with CSC build J100HATO0APB1 for the ATO region code. The download is 535 MB and has MD5 checksum c21dcf308367a70a246d8e6be80a1bc7, so you can verify the file after downloading. SamMobile added this file to the firmware archive on 14 March 2016.
How to flash J100HXXU0APB3 on the Samsung Galaxy J1 (SM-J100H)
We recommend updating through Samsung's own tools: over-the-air (Settings › Software update) or Samsung Smart Switch on a PC. Flash the full firmware with Odin only when you are sure about the risks. A wrong region or a failed flash can brick the device, and SamMobile is not responsible for any damage.
- Download the firmware package above and extract the ZIP. It contains the AP (PDA), BL, CP and CSC files, plus a HOME_CSC file.
- Download and extract Odin on a Windows PC, and install the Samsung USB drivers if the PC does not detect the phone.
- Switch the device off and boot it into Download mode (usually Volume Up + Volume Down while connecting the USB cable, or Volume Down + Bixby + Power on older models).
- Open Odin. The ID:COM box turns blue when the device is connected.
- Load the files in their slots: BL, AP, CP and CSC. Use HOME_CSC to keep your apps and data, CSC to wipe the device.
- Leave Re-Partition unticked and click Start. The device reboots when Odin shows PASS. The first boot after a flash can take a few minutes.
Step-by-step PDFs: 5-file firmware and 1-file firmware.
What the build numbers mean
PDA / AP (J100HXXU0APB3) is the Android system build; its last three characters encode the year, month and revision. CSC (J100HATO0APB1) is the region and carrier configuration, and CP is the modem firmware. The product code ATO identifies the region or carrier this package was made for (Open Austria); our list of Samsung CSC codes maps every code to its country and carrier. Flashing a package for a different product code changes carrier features and can be refused by the bootloader, so pick the one that matches the CSC shown under Settings › About phone › Software information.