As Samsung and Qualcomm patched EDL access, the industry moved to:
For devices from 2021 running Android 11 or 12 with bootloader version 4 or higher, the QSF Tool may no longer work unless you have the specific authorized loader signed by Samsung. Modern alternatives require paid services like or Chimera Tool .
While specific tool interfaces vary, the general process for using these 2021-era FRP removers follows a similar pattern. Here is a consolidated guide based on common practices from that time.
| Error Message | Cause | Solution | |---------------|-------|----------| | No device in EDL mode | Wrong cable or drivers not installed. | Use a shorted USB cable or test points. Reinstall Qualcomm drivers. | | Firehose loader refused | Incorrect loader for your chipset. | Double-check your processor. For a Samsung A51 (SDM665), don't use an SDM845 loader. | | Sahara protocol failed | Device dropped connection. | Reboot PC, disconnect battery (if possible), and try a different USB port (USB 2.0 preferred). | | FRP still there after reboot | VaultKeeper re-locked it. | After resetting FRP with QSF, immediately boot into stock recovery and perform a "Factory reset / Wipe data" before the first boot. | qsf tool qualcomm samsung frp 2021
The emerged in 2021 as a specialized software utility designed to bypass the Factory Reset Protection (FRP) lock on Samsung smartphones powered by Qualcomm Snapdragon processors . When a user performs an unauthorized factory reset on an Android device, Google's security protocols require the original account credentials to unlock the phone. The QSF Tool was developed by independent developers to help technicians and users regain access to locked devices by utilizing specific hardware vulnerabilities and diagnostic modes. Understanding the Technology Behind QSF Tool
: Designed to automate the removal of the Google Account lock once the device is correctly connected. Model Specific
While the QSF Tool was a staple in 2021, newer Android security patches (Android 12, 13, and 14) often require more advanced or paid solutions. For current devices, technicians often look toward: Octoplus FRP Tool As Samsung and Qualcomm patched EDL access, the
: Check Device Manager on your PC. Under "Ports (COM & LPT)," it should display Qualcomm HS-USB QDLoader 9008 . 3. Using the QSF Tool
: The device must be put into EDL mode, which often requires a specialized EDL cable or manually shorting test points on the motherboard (EDL points).
By 2021, Samsung had aggressively patched most software-level FRP bypasses. Android security patches from February 2021 onward disabled almost all "dialer code" tricks. Furthermore, Samsung’s (introduced with Android 11/One UI 3.1) made FRP persistent even after re-flashing stock firmware via Odin. Here is a consolidated guide based on common
The tool primary functions by communicating with the device while it is in Emergency Download Mode, allowing for deep-level partition access.
: QFIL is the official flashing utility from Qualcomm, designed to flash firmware onto devices with their chipsets. Many FRP bypass tools are built upon or mimic the QFIL framework, using a special "Firehose" programmer file to communicate with the device's memory. This Firehose file acts as a bridge, allowing the tool to read, write, or erase specific partitions that store the FRP data.