Monitor mode is a special mode of the network adapter that allows you to monitor the wireless network bandwidth - in this mode the network card intercepts all packets on a specified frequency. If the network interface allows you to use the capture mode, we can use a number of applications that are used in WiFi penetration testing and obtain useful information.
The qualcomm_android_monitor_mode repository presents a way to activate the monitoring mode on the internal WiFi adapter without having to patch the operating system kernel. The only requirements in this case are a smartphone that uses the appropriate Qualcomm WiFi module and a rooted Android environment . In my case it is a Samsung Galaxy S20 FE SM-G780G phone on which I will run the capture mode and an example using the aircrack-ng package.
Now we can try to run the airodump-ng application , or sniffer, to capture packets circulating in the WLAN.