If you're working on Mystique's Awakening Challenges in Fortnite Chapter 2 Season 4, you'll need to find a Phone Booth. One of his challenges is to use a phone booth to disguise himself.
As some people might research before unlocking the skin, you'll need to reach level 80 in the Battle Pass to unlock Mystique and level 86 to unlock the Awakening Challenges. Don't forget to equip the skin for the match or you won't be able to complete it.
Phone Booths are tied to Henchman locations, and aside from Stark Robots, there's only one other type of Henchman in Fortnite at the moment, and they're in the Doom Domain . We checked out Stark Industries, but couldn't find a phone booth there, so it doesn't look like you can disguise yourself as a Stark robot at this time.
Travel to Doom's Domain and you'll find the phone booth south of the large Doom statue. Keep in mind that you also need to visit this statue for one of Doom's Awakening Challenges. Jump into the phone booth by interacting with it, and Mystique will don the disguise and complete the challenge.
After completing all of Mystique's Awakening Challenges, you'll gain access to a built-in emote that allows you to copy the skin of the last person you eliminated using it.
