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https://www.gamesandconsoles.org/2019/09/02/psvitaguida-super-facile-per-il-downgrade-da-firmware-3-71-3-72-a-3-60-3-65/
[PSVITA]Guida super facile per il downgrade da firmware 3.71/3.72 a 3.60/3.65 con modoru 2.0