Manually Update Samsung Galaxy S21 FE 5G with Odin Without Data Loss

Preparing for the Manual Update

• 💡 Manually updating your Samsung Galaxy S21 FE 5G using Odin is possible without losing data, but requires precise adherence to steps.
• 📌 Check your phone's model name (e.g., SMG990B2) and software revision (the letter after the second double X, like 'B') in 'About phone' > 'Software information'.
• 🔑 You can only upgrade to a newer revision (e.g., B to C, D, E), not downgrade.
• 🎯 Note your service provider software version (e.g., TPL) as you'll need to download firmware matching this.

Downloading and Installing Necessary Files

• 💻 Download the correct firmware for your specific model and service provider from a reliable source.
• 💾 Download Samsung USB drivers and the Odin flashing tool (version 3.14.4 or similar) from hardreset.info or similar sites.
• ⚙️ Extract all downloaded files using a program like WinRAR or 7-Zip.
• 🔌 Install the Samsung USB drivers and restart your computer to ensure they are properly recognized.

Updating the Device via Odin

• 🔌 Shut down your phone and ensure your USB cable supports data transfer.
• 📲 Connect the cable to your computer, then press and hold both volume keys while plugging the cable into your phone to enter Download Mode.
• ⚠️ If a warning screen appears, press Volume Up to confirm entry into Download Mode.
• 🖱️ Open Odin, and load the firmware files by clicking on BL, AP, CP, and crucially, Home CSC (to preserve data).
• ⚡ If you select the standard CSC file instead of Home CSC, your data will be erased.
• ▶️ Once all files are loaded, click Start to initiate the update process.
• ⚠️ If an error occurs, check your cable, ensure your computer was restarted after driver installation, or verify you have the correct firmware revision (you cannot downgrade).
• ✅ The phone will automatically restart upon completion; the 'erasing' message during restart is normal and does not delete data when using Home CSC.