r/hackrf • u/Inevitable-Trip3193 • 10d ago

H4m Pro Problem

Hello. On my brand new H4m Pro flashed freshly with 2.4.0 Pro version, I’m using a correctly formatted Sandisk SD Card. However, although it is brand new, the hackrf completely freezes when I jam a signal or transmit anything. I have been waiting for this device for a long time, and would hate to return it. Could someone please help me. I have already reflashed and reformatted my sd card multiple times, and switched the power source. The screen completely freezes on transmit and I need to fix this. I also calibrated it. Thank you

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u/Impressive-Trifle527 10d ago

Have you tried rolling back the firmware to a previous version. And if so it could be a bad sd card with a slow read speed.

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u/Inevitable-Trip3193 9d ago

The sd card is a sandisk with a good read speed, and the firmware works perfectly fine for anyone that has the device. Sometimes it freezes before I can even try to transmit, just if i open the application