Right-click on (or ResearchDownload.exe ) and select Run as Administrator .
Press and hold the key (some variants require holding both Volume Up and Volume Down together).
If a recent automatic update introduced bugs or features you dislike, you can downgrade to a previous stable build.
If you encounter issues during the firmware installation, review these quick fixes:
Resolves instances where your phone hangs continuously on the Nokia logo during startup.
| Model | Firmware Details | |--------|------------------| | | TA-1357, TA-1359, TA-1361, TA-1377 | | Chipset | Unisoc SC9863A (Spreadtrum) | | OS | Android 11 (Go edition) | | Firmware Format | .pac (for Unisoc/SPD tools) | | Flash Tool Required | SPD Upgrade Tool / ResearchDownload |
Right-click each zip file and extract them using a tool like WinRAR or 7-Zip.