Before connecting your phone to the PC, ensure you have:
The device's Knox security triggered because the bootloader detected an unauthorized modification.
Click on the button (or PDA in older versions) and select the downloaded Samsung_A105F_U3_Auto_Patch_File.tar or .md5 .
Samsung uses a rollback prevention mechanism called Binary (or U-code). You can check your binary version by looking at the build number in Settings > About Phone > Software Information . The 5th character from the right indicates your binary version. You can flash a U3 file on a U3 phone, but you cannot downgrade a U3 phone to U2 or U1. Samsung A105f U3 Auto Patch File
On Samsung A105F with U3, you simply flash a generic file – you must patch your own firmware’s boot image using Magisk.
Look at the ID:COM box; it should turn blue or light blue, indicating your phone is properly connected.
: Go to Developer Options in your settings and enable OEM Unlocking . Ensure your bootloader is fully unlocked, or Odin will reject the patch file. Required Tools and Download Checklist Before connecting your phone to the PC, ensure
Using an simplifies this by combining the system root and network certificate patch into a single, pre-configured flash file, removing the need for manual commands through expensive box software interfaces. Understanding the Technical Requirements
The Auto Patch File is not an official Samsung release; rather, it is a community-engineered tool created by developers on forums like XDA Developers or GSM hosting sites (e.g., Easy Firmware, Z3X). Its primary purposes are:
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Restores cellular capability when your SIM card stops working.
Unlike traditional root methods or unauthorized boot images, this patch file is signed correctly, allowing the device to boot securely without permanently tripping the Samsung Knox warranty flag.