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Released by RazorX are PS3MFW task files (.tcl). Adding this task file to the PS3MFW app will allow you to create your very own modified (custom) firmware v3.55 with firmware v3.70 spoofing baked in.
The PS3 will not ask you and will prevent you from upgrading to firmware v3.70, if it has been spoofed. However, you will not be able to sign-in to the PlayStation Network (PSN) nor be able to run games requiring firmware v3.56, 3.6x, and 3.70.
There are three task files provided by RazorX: spoof_version_3.70.tcl, change_xml_files.tcl, and change_rco_files.tcl.
Download version_3.70.tcl:
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