Most likely the final update to FNaF 1 PSP!
1.3.1:
1. Animatronics now don't randomly stop in the middle of the night anymore.
2. Bugged out audio has been fixed.
3. Press Circle to end the phone call.
4. Fixed a lot of crashing issues.
5. Added easter egg (you can find out where)
for once read the friggin instructions on the download page