How do I upgrade on Southwest Airlines?

To have a wonderful experience at Southwest Airlines, why don’t you travel by business class? Yes, don’t feel depressed if you are already done with the flight bookings at Southwest Airlines. Use the How do I upgrade on Southwest Airlines feature and follow the guidelines while reading the details or listen to the steps by dialling the Southwest Airlines customer service number mentioned OTA: +1-800-970-3794 (A call to a USA agent).