Once in the test mode file manager, navigate to the system storage. The language files are typically located in two folders ( PRG0 and PRG1 ) on the NAND storage and are named with the .lng file extension. The original Japanese files for the MRZ09 series are named something like PF110JPJPN.LNG .
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Here's how to update your device's software: Once in the test mode file manager, navigate