Problem with Hp laptop and Ubuntu

I installed Ubuntu on my HP pavillion ab series (i7 processor).
Ubuntu was running just fine when I realized it is not able to detect to my home wifi but able to connect to my phone hotspot.
I had faced similar problem in opensuse earlier but then I removed it considering no driver support for my wifi module (Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
).
I started googling stuff and finding peers which were facing similar problems. After sleeping over the problem, I had one crazy observation. The difference between my phone's hotspot and wifi router was the distance from my laptop. I took my laptop and stood next to the wifi router, and found out that it was able to detect wifi over there. Voila.

Then I googled in this direction and found out that it is a problem.
  

sudo tee /etc/modprobe.d/rtl8723be.conf <<< "options rtl8723be ant_sel=1"

Fired this command ,then restarted my laptop.

It worked.

Thanks to
https://askubuntu.com/questions/872931/how-to-make-wifi-signal-stronger-on-ubuntu-16-04-lts
https://connectwww.com/how-to-solve-realtek-rtl8723be-weak-wifi-signal-problem-in-ubuntu/4625/

Cheers !!