In my case was [2]...sudo modprobe -r rtl8723be
sudo modprobe rtl8723be ant_sel=2
And last...iwlist scan | egrep -i 'ssid|quality'
Thank you so much guys!echo "options rtl8723be ant_sel=2" | sudo tee -a /etc/modprobe.d/rtl8723be.conf
In my case was [2]...sudo modprobe -r rtl8723be
sudo modprobe rtl8723be ant_sel=2
And last...iwlist scan | egrep -i 'ssid|quality'
Thank you so much guys!echo "options rtl8723be ant_sel=2" | sudo tee -a /etc/modprobe.d/rtl8723be.conf