Hi Shiva,
There is no direct phone call to lead creation available in the Live Activity pane within Cloud for Customer (i.e. via CTI). However, if you have both the sales and the service licenses, you can implement CTI and then from phone calls create tickets which can be converted to leads.
With the latest release, you also have the option (via Language Adaptations on the Administrator screen) of relabeling tickets as something else...say for example call them "inquiries." An inquiry could be a service request but it could also just be an inquiry like, "Please send me a price quote on product X."
Kind regards,
Angela