If you want a plan only for Calling then Jio Rs 1748 plan is the best for you.
In this plan Jio Company Offer 336 Days Vailidity.
Under this plan users can make unlimited calls on any network for 11 months.
3600 free SMS is also available in Jio's plan.
The internet data facility is not available in this Jio plan.
Subscription of JioTV and JioAICloud is also available in the plan.