There are community projects that mod existing PSP games (like Vice City Stories ) to look like San Andreas by swapping textures and character models, sometimes referred to as "San Andreas Stories" mods.
To transfer the ISO file to your PSP:
: The PPSSPP application allows you to map transparent on-screen touch buttons or seamlessly connect an external Bluetooth gamepad. Gta San Andreas Psp Iso File Download Ristechy
If you want to for your specific phone, or if you'd like help troubleshooting common errors like a black screen, let me know! I can also help you find specific mod packs if you want more features. There are community projects that mod existing PSP
Full Android optimized APK rather than a PSP port. Alternative: GTA San Andreas for AetherSX2 I can also help you find specific mod
: RisTechy provides the original PS2 ISO intended for use with the AetherSX2 emulator on Android. This is the full game but requires a powerful mobile device to run.