The reality mogul revealed the spot Monday on Conan with Conan O'Brien.
"The ad really incorporated a lot of my personality," Kardashian West tells PEOPLE. "We really went over scene by scene and what selfies I thought would really showcase me and what I would do," she explains. "I ski, I went to tennis camp growing up. So there are some things in the commercial that I don't think people know about me."
But it's not the first time Kardashian West has appeared in a Super Bowl ad – she did one for Sketchers in 2011.
Alice Gu / Courtesy T-Mobile
"I think it's such an iconic time, everyone watches the Super Bowl," she says. "We wanted to come up with something that was fun, witty, sexy and I think this commercial really kind of has everything," she says of the comedic T-Mobile ad.
"Whether it's business calls, selfies, whatever, I'm always on my phone," says the star, 34. "And the concept was just so fun and I just got it right away, it clicked."
Gustavo Oliva / T-Mobile
For more from Kardashian West, including her plans for baby number two, pick up the newest issue of PEOPLE, on stands Friday