There is no single official repository for a version explicitly numbered "20.0114." However, version and similar variants (like R4.20.4201) are the standard packages used for flashing firmware via tools like Research Download.
Once you have the authentic file, follow this installation sequence: spd driver 20 0114 update link
September 30, 2024 – checksums match original Spreadtrum release. Feature Concept: Driver Update R20
After installation:
SPD20.inf.: Sites like Hovatek provide collections of unsigned drivers for manual installation via Device Manager. Open Device Manager (Win + X → M)