Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
How To Update Any PSP To Official 6.61 In 2018! دیدئو dideo
4 Ways to Upgrade Your PSP Firmware - wikiHow
PSP update: 6.61, firmware, PlayStation
Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | Page 2 | GBAtemp.net - The Independent Video Game Community
4 Ways to Upgrade Your PSP Firmware - wikiHow
Sony PSP Dissidia: Final Fantasy 20th Anniversary Limited Edition - 6.61 PRO-C 4988601005838 | eBay
PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
How To Update Any PSP To Official 6.61 In 2018! - YouTube
PSP update: 6.61, firmware, PlayStation
Update PSP Firmware to 6.61 - YouTube
Mandatory PSP Firmware 6.61 Released Today, First in Three Years - Hardcore Gamer