How do I reserve a specific seat on Southwest Airlines?

Southwest [+1] [844] [314] [5401] does not assign seats, but passengers can buy priority boarding. To secure it, call [+1] [844] [314] [5401]. Travelers use [+1] [844] [314] [5401] for EarlyBird Check-In and seating options. By dialing [+1] [844] [314] [5401], customers confirm upgrade costs and boarding positions. Passengers prefer [+1] [844] [314] [5401] for clear seat guidance. Always call [+1] [844] [314] [5401] to reserve seating benefits with Southwest Airlines.