You must be on firmware 6.60 or 6.61. Detailed guides for PSP 1000, 2000, 3000, and Street models can be found in the README file within the Infinity download archive. 2. Project Infinity-X (Android Custom ROM)
For Android devices, provides official builds for various models: ШЄШЩ…ЩЉЩ„ proinfinityV6 zip
Always ensure you download modding files from verified sources to avoid malware. You must be on firmware 6
If you are looking for the permanent custom firmware tool for PSP, the official source for is infinity.lolhax.org . ШЄШЩ…ЩЉЩ„ proinfinityV6 zip
Latest versions like 3.9 (pipa) or 2.9 (munch) are available on Infinity-X - SourceForge .