Using a tool like SP Flash Tool or DFT Pro:
: This means the connection timed out. Disconnect the battery terminal inside the phone, reconnect it, and try the LibUSB filtering process again.
In MediaTek-based smartphones, the RAM space dictates critical hardware parameters specific to your individual device. The key files include: nvram nvdata nvcfg protect1 / protect2
: Open your preferred software suite (such as UnlockTool or DFT Pro). Navigate to the MediaTek Media Management tab, read the phone partition map, and execute an explicit Erase command on the nvdata and nvram blocks.
Restoring the system ensures the Helio G91-Ultra can run casual games and entertainment apps without crashing.
: Some repairs require specialized "Engineering Firmware" to bypass security constraints or access Diagnostic mode. Common Fix Procedures
: If a phone is stuck in a bootloop after a failed update, a full firmware dump (including NV files) can often bring it back to life. Critical Technical Warnings Security & Legality
If you are using free utilities like SP Flash Tool, run an MTK Auth Bypass tool first. This disables the secure boot mechanism on the Helio G91 chipset, allowing raw binary files to be written directly to the storage sectors. Advanced premium tools like UnlockTool handle this step automatically. Step 3: Flash the NV Dump Files
In your flashing software, click or Disable Auth .
Flash: Power off your device. Hold the Volume buttons and connect it to the PC. The tool should detect the MTK port and begin writing.
Several tools and software are available for working with TidesMoon dump files and NV files on the Xiaomi Redmi 13. Some popular options include:
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