diff --git a/Troubleshooting.md b/Troubleshooting.md
index ede50cb..de9d609 100644
--- a/Troubleshooting.md
+++ b/Troubleshooting.md
@@ -7,6 +7,7 @@
 | No splash screen / No time & date / Touchscreen does not work / Status bar icon disappeared / Backlight timeout abnormal / Encoder dial abnormal | Check [settings](https://github.com/portapack-mayhem/mayhem-firmware/wiki/Settings).                                                               |
 | It says xxx missing / can't find xxx / xxx read error / xxx is outdated / xxx empty or you can't see xxx.                     | Make sure sdcard contents matches your [firmware version](https://github.com/portapack-mayhem/mayhem-firmware/releases). |
 | Apps are missing or greyed out after upgrading.  | Make sure [sdcard contents](https://github.com/portapack-mayhem/mayhem-firmware/wiki/Update-firmware#microsd-card-files) matches your [firmware version](https://github.com/portapack-mayhem/mayhem-firmware/releases), particularly the external APPS folder, and make sure you [correctly put the sdcard contents](https://github.com/portapack-mayhem/mayhem-firmware/wiki/Update-firmware#microsd-card-files). |
+|`hackrf_info` says `Hardware does not appear to have been manufactured by Great Scott Gadgets`|It's because you have a Hackrf clone istead of original from GSG. If you believe it's a mistake, contact the seller or GSG official support.|
 | Unexpected spike on my waterfall / IQ / spectrum. | It's either a [DC offset](https://hackrf.readthedocs.io/en/latest/faq.html#what-is-the-big-spike-in-the-center-of-my-received-spectrum) or noise from power. For reducing the noise, try using the internal battery. For DC offset, there's nothing you can do, however it’s normal on SDR. |
 | My computer can't see my HackRF | Try at least 5 different cables. If you are on Windows, try to install drivers in release package. Also try your luck with [Zadig](https://zadig.akeo.ie/). If not working, try on a Linux machine (exclude Ubuntu) |
 | My sound board app can't see the files i putted in, but my fileman app can | folow [Soundboard](https://github.com/portapack-mayhem/mayhem-firmware/wiki/Soundboard) to make correct file |