Samsung Galaxy S25 Ultra S938B Knox KG MDM Unlock File (U1 Bit)

This post provides the latest Samsung Knox KG MDM Unlock firmware file specifically for Galaxy S25 Ultra model S938B (U1 Bit). This file is professionally prepared for technicians who are facing KG Locked, MDM enrollment, corporate lock, or restricted device issues after reset or update.

Unlike random patches, this is a 100% tested, verified working solution used in real repair labs. If your S25 Ultra shows “Device is managed by your organization”, KG State: Locked, or fails to activate after flashing official firmware, this file is built for that exact scenario.

📱 Device Information

• Brand: Samsung
• Model: Galaxy S25 Ultra
• Model Number: SM-S938B
• Security Bit: U1
• CPU: Qualcomm Snapdragon (Global Variant)
• Android Version: Android 14 / 15 (compatible)
• Security Patch: Supported up to U1
• Region: Global / Europe / Middle East

📦 Firmware File Details

• ✔ Knox KG Unlock File
• ✔ MDM Remove / Bypass Firmware
• ✔ Fixed Firmware (No relock after reboot)
• ✔ Flash File (Odin supported)
• ✔ Auto-Patch Compatible
• ✔ Safe for professional repair use

✅ What Problems Does This File Fix?

• MDM Lock after factory reset
• Knox Guard (KG) Locked state
• “This device belongs to an organization” message
• Activation blocked after flashing stock ROM
• Corporate / demo unit restriction

This file is not a basic FRP bypass. It targets server-side Knox KG flags stored in protected partitions, making it effective where normal flashing fails.

🛠 Required Tools

• Samsung Odin Tool (Latest Version)
• Pandora Tool / Chimera / DFT Pro (recommended)
• Samsung USB Driver (latest)
• Windows PC (Windows 10 / 11)
• Original USB cable

📌 Flashing Guide (Step-by-Step)

1. Install Samsung USB Drivers on your PC
2. Extract the downloaded firmware ZIP file
3. Power off the phone completely
4. Boot into Download Mode (Volume Down + USB)
5. Open Odin Tool on your PC
6. Load the provided file into the required Odin slot
7. Ensure Auto Reboot is checked
8. Click Start and wait for PASS
9. First boot may take longer – be patient

⚠️ Cautions & Important Notes

• ❗ Only for SM-S938B U1 – do not flash on other bits
• ❗ Backup data if possible (process may wipe user data)
• ❗ Do not update firmware immediately after unlock
• ❗ Use professional tools for best results

🧪 Tested & Verified

This firmware has been tested on live Samsung S25 Ultra units with confirmed KG/MDM locks. Successfully removes restrictions without soft-brick or re-lock after reboot.

🧩 Troubleshooting

• KG still locked: Ensure correct bit version
• FRP showing: Remove FRP first, then apply KG file
• No baseband: Flash modem from same binary
• Bootloop: Perform factory reset after flash
• QDLoader 9008: Use EDL recovery before Odin
• Dead boot: Requires ISP / UFS level repair

❓ Frequently Asked Questions

Is this file safe for permanent unlock?

Yes, if used on the correct model and bit, the unlock is stable.

Will OTA updates relock the phone?

Yes, updating firmware can relock KG. Disable auto updates.

Does this remove FRP?

No, FRP must be handled separately.

Can I flash using only Odin?

Yes, but professional tools improve success rate.

Is root required?

No root is required.

📂 Firmware File Name

Samsung_S25_Ultra_S938B_U1_KG_MDM_Unlock_File.zip