Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
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PSP: Infinity 2.0 – Permanent 6.61 Custom Firmware for every PSP! - YouTube
PSP: Custom Firmwares for Firmware 6.61 possible - Currently being updated! - Wololo.net
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How To Update Any PSP To Official 6.61 In 2018! - YouTube
4 Ways to Upgrade Your PSP Firmware - wikiHow
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PlayStation Guide
Upgrading PSP OFW 3.90 to 6.61 without a battery : r/PSP
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
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6.61 Archives - Wololo.net
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
PSP 6.61 Infinity PRO Custom Firmware Tutorial! (Permanent CFW) 2018! - YouTube
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
psp – Wololo.net
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Got my PSP GO Today :) it has custom firmware 6.61 : r/PSP
PSP: 6.61 Custom Firmware! 6.61 ME & 6.61 LME CFW! - YouTube
