Well, first u gonna have to update to FW 3.52 M33-4 in order to update to 3.71 M33. Then u can go ahead and grab 3.71 M33 and then put the "UPDATE" folder inside of the "GAME" folder. And make sure in the configuration in recovery that the "GAME" folder is set on 3.XX kernel not 1.50 kernel. Then once on 3.71 M33 u can if like install the 1.50 kernel by using the add-on installer.

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