There are several scenarios where turning on Runtime Trace Mode is essential, especially when dealing with complex flashing issues:
Developers porting custom recoveries (like TWRP) or custom kernels use trace modes to monitor how the Preloader interacts with modified partition tables. Critical Components Tracked in Runtime Trace Mode
If the trace mode reports an invalid address map or a checksum error right before data transmission, the firmware package is corrupt or designed for a different variant of the processor. Smartphone Flash Tool -runtime Trace Mode-l
| Tool | Primary Chipset | Key Use Case | | :--- | :--- | :--- | | | MediaTek (MTK) | Low-level flashing & unbricking of MTK devices. | | Odin | Samsung Exynos & Qualcomm | Flashing firmware on Samsung Galaxy devices. | | Mi Flash Tool | Qualcomm (Xiaomi devices) | Flashing Fastboot ROMs on Xiaomi, Redmi, and POCO devices. | | TWRP | Any with unlocked bootloader | A custom recovery for flashing ZIP files (ROMs, mods) directly on the device. |
: A file that handles the initial handshake between the tool and the phone’s internal memory. There are several scenarios where turning on Runtime
The trace showed the Preloader signature was zeroed out. Standard flash tools wouldn't write because the signature validation failed. However, by using the -l trace, the engineer knew to use BootROM Exploit Mode (temporarily shorting CLK and CMD on the eMMC) to force BROM to bypass signature check. The trace confirmed the bypass worked, and the device was restored.
The technician enabled using Ctrl+Alt+T . The logs indicated that the tool was encountering a minor, non-critical error in the ROM being flashed. Realizing the tool was being overly cautious, the technician bypassed the mode using the Ctrl+Alt+S shortcut. This forced the flash to continue past the error. The operation then successfully completed at 100%, and the phones booted up. | | Odin | Samsung Exynos & Qualcomm
Activating this mode is not for the faint of heart. It requires using the command line, not just the GUI. Here is the standard procedure for advanced users:
Within the SP Flash Tool menu bar, navigate to the appropriate section—usually under Options -> Connection or by selecting "Runtime Trace Mode" if listed directly in the interface.