: Always verify the MD5 hash (typically b4c8d1e9... for 2.8.1) provided on the download page to ensure the file was not corrupted during transit.

If your C5c is online and running a previous version (e.g., 2.5.x or 2.6.x), you can use the built-in updater:

Alternative: Use the integrated checker within the C5c UI. Navigate to . Click "Check for Updates." If your radio is still on a very old branch (e.g., 1.x), it may not auto-offer 2.8.1. In that case, manual upload is required.

: Enhanced signal stability and modulation efficiency for better throughput in dense RF environments.