Realtek Wifi Card RTL8723be Not Working Properly

Question

I have tried all the method present inthe internet. But can't able to solve this problem.
Problem is that when i'm closer to the wifi router only at that time it is showing wifi signal, but when i'm just little far from it, it is not showing wifi routers signals.
Please Help me

Answer 1

With Ubuntu 16.04 and later, go to Parameter settings as nothing needs to be downloaded

Progress from Larry Finger from here

If you installed rtlwifi-new-dkms from Pilot6's PPA, it will need to be removed with

sudo apt-get remove rtlwifi-new-dkms

Reboot, then

sudo apt-get install git build-essential
git clone https://github.com/lwfinger/rtlwifi_new
cd rtlwifi_new
make
sudo make install

Reboot and then

Parameter Setting

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

Test wireless, if no change then

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

Test wireless again, one or the other should result in better reception

When you find that one works better than the other

echo "options rtl8723be ant_sel=X" | sudo tee /etc/modprobe.d/rtlbtcoex.conf

Where X is 1 or 2- whatever resulted in better performance, in the case of Swapnil Sharma it would be

echo "options rtl8723be ant_sel=1" | sudo tee /etc/modprobe.d/rtlbtcoex.conf

Then the parameter will be remembered following a restart