If you want, specify the exact Hytera model (and current firmware version) and I’ll provide model-specific steps and links to the vendor support pages.
To legitimately update your radio to V9 (or any version), follow this path:
: DMR-FW_TerminalBatchUpgrade_Subscribe_TO_V9.00.04.405.iM.zip . Compatible Models for V9.0
Many search for on file-sharing sites. You should never use these for three reasons:
Models with SD cards can store GPS logs when outside of network coverage and export them later.