An update to the PSP® system software was made available on September 13, 2007. If you update your PSP® system, the system software will be version 3.71.

The PSP® (PlayStation®Portable) system software update may include security patches, new or revised settings and features and other items, which will change your current operating system. We encourage you to check this page from time to time for software updates and to always maintain your system to use the latest version of the system software.
An update to the PSP® system software was made available on July 24, 2007. If you update your PSP® system, the system software will be version 3.52.