First, 2.0 or earlier is needed for homebrew. Socom and some of the newer games will not work with the firmware tricker like older games with updates do. But homebrew can work on 2.0 (limited) and you can downgrade. o the backup is possible but cannot tell you what does it. against rules. but you need 1.5 to do so. hope this helped. If you don't find a used one at gamestop with an old firmware then check ebay.
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