[DA] Sending security key... ACK received. Diagnosis: If you see NACK here, you have an auth bypass error. This is common on newer MTK CPUs (Helio G90/G99). You need a custom auth_sv5.auth file.
A specialized diagnostic state that outputs detailed USB communication data and internal memory tracking metrics.
[Host PC] ----(Control Packets & Handshake)----> [VCOM Driver] | (Runtime Trace Enabled) | [Target Phone] <---(DA / Preloader Communication)-------+ Why You Need Runtime Trace Mode
Runtime Trace Mode provides a detailed log of every action the tool performs. It is essential for troubleshooting "bricked" devices or identifying exactly where a flashing process failed. Key capabilities include: Smartphone Flash Tool -runtime Trace Mode-l
Different chipsets require different flashing tools. This table provides a quick comparison:
This mode is essential for identifying the root cause of common errors like "BROM ERROR" or "Download Fail". Log Generation:
In embedded systems, boot time is critical. By analyzing timestamped traces, engineers can identify that a memcpy operation in the preloader is taking 300 ms longer than expected due to a misconfigured cache policy. [DA] Sending security key
Once the key combination is pressed, a user may not see a dramatic change in the graphical interface. However, the tool is now operating in a more verbose, diagnostic-heavy state, preparing to log all communications with the phone.
+---------------------------+ | 1. Load Download Agent | --> (MTK_AllInOne_DA.bin) +---------------------------+ | v +---------------------------+ | 2. Import Scatter File | --> (Android_scatter.txt) +---------------------------+ | v +---------------------------+ | 3. Select Flashing Mode | --> (Choose "Download Only") +---------------------------+ | v +---------------------------+ | 4. Initialize Process | --> (Click 'Download' Button) +---------------------------+ | v +---------------------------+ | 5. Connect Powered-off | --> (Hold Vol Down / Plug USB) | Smartphone | +---------------------------+ SP Flash Tool v5.1924 - Download SmartPhone Flash Tool
Disclaimer: Modifying smartphone firmware carries inherent risk. Runtime trace mode is a diagnostic tool intended for authorized service personnel and advanced developers. Always ensure you have the legal right to modify the target device. This is common on newer MTK CPUs (Helio G90/G99)
If you are flashing a custom ROM, the tool compares the "Expected State" vs. the "Runtime State." If a script tries to write to a block that doesn’t exist or is locked, the heatmap flashes the specific sector, allowing you to stop the process before a hard brick occurs.
When executing the standard layout of the Smartphone Flash Tool , the app hides thousands of background actions. It normally displays a simple progress bar. Activating pulls back this curtain.
If a device's Partition Management Table (PMT) layout does not match the incoming ROM layout, flashing fails. Trace mode tracks memory offsets directly from the physical eMMC/UFS storage, helping you safely determine whether a "Firmware Upgrade" path or a manual formatting route is required. 3. Unbricking Severely Damaged Devices
Without runtime trace mode, this phone would be e-waste.
The correct firmware for your exact phone model and build number. Scatter File: Found inside the firmware folder. SP Flash Tool: Latest version recommended. 2. Steps to Activate Trace Mode