echo "options rtl8723be fwlps=N ips=N" | sudo tee /etc/modprobe.d/rtl8723be.conf

sudo modprobe -r rtl8723be
sudo modprobe rtl8723be

sudo apt-get install linux-headers-generic build-essential git
git clone http://github.com/lwfinger/rtlwifi_new
cd rtlwifi_new
make
sudo make install

sudo apt-get install git linux-headers-generic build essential
git clone git://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
git checkout rock.new_btcoex
make
sudo make install

sudo modprobe -rv rtl8723be
sudo modprobe -v rtl8723be ant_sel=1

iwlist scan | egrep -i 'ssid|signal'

sudo modprobe -rv rtl8723be
sudo modprobe -v rtl8723be ant_sel=2

iwlist scan | egrep -i 'ssid|signal'

echo "options rtl8723be ant_sel=X" | sudo tee /etc/modprobe.d/rtl-ant-sel.conf