The Navneet High School Scholarship VII is nowhere related to the Galaxy S4. If you can't hear the caller tune, it means the phone is not getting any signal service. This could be a problem with the phone or a problem from the carrier's network. In either case, first make sure the phone is getting reception. You can try with another SIM card and secondly, try visiting your carrier's shop and service center. They should be able to provide information about the status of your SIM card and why the phone doesn't get the caller tune.