Times they sure have changed, which means that your sales person should have changed with the times.
You should no longer have to wait for a phone call to connect with your car sales professional and you should have more choices available to you to connect with him or her.
If fact, you should be able to chat with them via Facebook Messanger, or even further, via text messages.
If your sales person is still hung up on using only his/her phone to speak with you, you may want to take this as a sign that it is time to upgrade your sales person.