2x PSP is usually the "sweet spot" for modern Android phones.
Since the PPSSPP method isn't native, you can use these more reliable alternatives: Emulator/App Description AetherSX2 Resident Evil 4 Ppsspp Android Iso File Download NEW
Capcom did release a native Android version years ago, known as the Resident Evil 4: Mobile Edition Native touch controls and small file size. 2x PSP is usually the "sweet spot" for modern Android phones
if you have a patch file, otherwise stay at 4:3 to avoid stretching. 4. Official Native Mobile Options Resident Evil 4 Ppsspp Android Iso File Download NEW
Most "New" versions require you to move a "SAVEDATA" folder and a "TEXTURES" folder into the internal PSP directory to prevent glitches. ⚠️ Important Safety Tips
These files may contain malware or irrelevant data disguised as the game. How to Actually Play RE4 on Android