The keyword "top" doesn’t just refer to download ranking; it also refers to deploying the firmware in a top-performing manner. Here is expert advice.
Hytera V9 does not allow downgrading to V8 once installed because of non-reversible security chip updates. Be absolutely sure your team is ready for V9.
Interrupted data transfer or corrupted firmware file. Solution: Enter forced upgrade mode: Hold the Side Button 1 + PTT + Power simultaneously. Connect to CPS and re-flash the firmware. If that fails, you need a JTAG recovery (requires professional service).
Upgrading to firmware V9 provides significant enhancements over previous V7 or V8 versions. Key highlights include: