If your bootloader was unlocked, flashing official firmware via SD card . It only restores system partitions.
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In this article, we will cover everything you need to know about the process: what it is, where to find safe firmware, how to prepare the SD card, and a step-by-step flashing guide.
| Error Message / Behavior | Probable Cause | Solution | | :--- | :--- | :--- | | | Wrong firmware version | Double-check model number. Search for region-specific build (e.g., T1-701uC100B010). | | No response, just black screen | SD card not FAT32 | Reformat SD card to FAT32 (use third-party tool like GUIformat if 32GB+). | | Progress bar stops at 5% | Corrupted update.app | Re-download firmware. Verify file integrity. | | "Incompatible with current version" | Trying to downgrade | You must flash a version equal or newer than the last installed ROM. | | Tablet boots to recovery mode | Missing dload folder | Ensure dload/UPDATE.APP is at SD card root, not inside any subfolder. | | Progress completes but still bootloops | Partition damage | Perform the flash again. If fails, firmware is for different hardware revision. |
The correct file will be named . It is typically packaged in a .zip or .rar archive. Inside, you may also find a folder named dload .