Realtek RTL8723BE weak wifi signal and disconnects

rtl8723BE-setup.txt

1. Open Terminal, and then
iwconfig
and note down the wl* number.
2. Download new driver. Download rock.new_btcoex from GIT and unzip it to the desktop for example.
3. Again in Terminal type and run:
cd Desktop/rtlwifi_new-rock.new_btcoex
make
sudo make install type your ubuntu password.
sudo modprobe -rv rtl8723be
sudo modprobe -v rtl8723be ant_sel=2
sudo ip link set wl* up use your wl* number.
sudo iw dev wl* scan same.
To make the settings permanent, type below command
echo "options rtl8723be ant_sel=2" | sudo tee /etc/modprobe.d/50-rtl8723be.conf
Note: After your OS (Kernel) update, you need to apply these settings again to get strong signa