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PSP: Custom Firmwares for Firmware 6.61 possible - Currently being updated! - Wololo.net
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
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UMD drive doesn't work after updating to 6.61 Infinity PRO CFW : r/PSP
How to Update Your PSP Firmware
Risen from the dead: PSP Firmware 6.61 is now available! - Wololo.net
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PSP update: 6.61, firmware, PlayStation
PSP GO 6.61 Infinity Permanent CFW (PRO) Full Tutorial! 2017! - YouTube
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Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | GBAtemp.net - The Independent Video Game Community
Why do so many people prefer 6.60>6.61? : r/PSP
PSP 6.61 Firmware Update Download
Risen from the dead: PSP Firmware 6.61 is now available! - Wololo.net
The Longest Mystery of The PSP v6.61 Firmware Update Finally Solved!!! - YouTube
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
4 Ways to Upgrade Your PSP Firmware - wikiHow
How To Update Any PSP To Official 6.61 In 2018! - YouTube
How To Update Your PSP TO 6.61 Official Firmware in 2021 - YouTube
Updating The PSP System Software to 6.60 / 6.61 - pspunk
