Mandatory PSP Firmware 6.61 Released Today, First in Three Years - Hardcore Gamer
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Can someone help me update my psp 1001 from 2.80 to 6.61 : r/PSP
Why do so many people prefer 6.60>6.61? : r/PSP
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How To Downgrade PSP 6.61 To 6.60! (Chronoswitch Downgrader) 2017! - YouTube
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How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
PlayStation Guide
Install PSP 6.61 Pro-C Infinity Custom Firmware | GBAtemp.net - The Independent Video Game Community
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4 Ways to Upgrade Your PSP Firmware - wikiHow
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
How To Update Any PSP To Official 6.61 In 2018! - YouTube
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
PSP 6.61 Infinity PRO Custom Firmware Tutorial! (Permanent CFW) 2018! - YouTube
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PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
PSP update: 6.61, firmware, PlayStation
Risen from the dead: PSP Firmware 6.61 is now available! - Wololo.net
PSP GO 6.61 Infinity Permanent CFW (PRO) Full Tutorial! 2017! - YouTube
