Replug the USB cable and click the Remove FRP (New Security) button again. 4. Disable Windows Defender and Antivirus Software
Even if your PC recognizes the device in Windows Explorer, SamFw requires specific, updated drivers to communicate properly with the phone in MTP mode. Uninstall existing Samsung drivers. Download and install the latest Samsung USB Drivers. Restart your computer. 3. Change USB Port and Cable
If you have tried all exploit options within SamFW and still get a "FAIL" message, your device security patch is too new for the tool's current internal database. You can try these alternative methods:
Avoid installing software from sources you do not trust, as these can be sources of malware or exploits. samfw running exploit fail updated
If the automated exploit fails, you can try these alternative methods:
When the software displays "Running exploit... FAIL", it means the tool successfully sent the command sequence to the device, but the device rejected it. This rejection breaks down into three primary root causes:
The specific installed on your phone.
Older SamFW versions — such as 4.7.1 or earlier — are more likely to throw a FAIL error on newer devices. Version 4.9 specifically addressed “MTP reboot sometime return FAIL” and fixed an X509 certificate issue that prevented the tool from launching on certain systems. Later versions (5.2, 5.3, 5.4) added explicit support for Android 16, USA 2024 models, and EDL (9008) mode for deeply locked devices.
→ Ignore “Running exploit… FAIL” and check the phone’s actual CSC afterward — the change may have succeeded even with the error message.
SAMFW Tool itself offers a paid online service for devices with higher security levels (post-2023 patches). If the free exploit keeps failing, the official paid service may succeed. However, proceed with caution: the same security updates that block the free exploit may also hinder the paid method on the most recent devices. Replug the USB cable and click the Remove
If you encounter this error, it generally means the automated "one-click" method is blocked. Try these updated troubleshooting steps:
As reported by users on the Galaxy S21 Reddit Community , a common pattern looks like this: Stage 1: Fail Stage 2: Pass Stage 3: Fail
Note: If *#0*# does not work, try *#808# or *#9090# depending on your region and carrier. 4. Verify USB Drivers and Hardware Uninstall existing Samsung drivers
Understanding the reasons why the exploit fails is the first step to fixing it. Below is a table that breaks down the most common causes.