ISO from a reputable source and use the PPSSPP app to run it.

If you absolutely insist on playing the true on your Android phone, you must skip PSP emulation entirely. Mobile hardware has advanced to the point where high-end Android devices can experiment with PC and console emulation. Option 1: PS3 Emulation (RPCS3 via Windows Emulators)

Vulkan (use OpenGL if Vulkan causes visual glitches).

. Since the PPSSPP emulator only runs PSP games, a native version of Round 4 does not exist for this platform.