How to share my Cable Broadband internet connection with my Phones through USB-wifi-router?

I use internet in my PC which is a Cable Broadband Connection, and I have a USB wifi router of TP Link.
I have created my PC a wifi Hotspot by installing that wifi router, and Phones are getting connected with it. But, phones are unable to use internet that I am using in this PC.

Is it because, I am having 2 different connection or, network system?
if it is, how can I share my cable broadband internet with my phones?

FYI, I am operating an iPhone and a Android.

Thanks in advance. Have a nice day.