It would depend on their cultural understanding of magic. Our typical <PERSON>/D&D derived medieval fantasy worlds tend to have models of magic that are very amenable to the identification of advanced technology as magical. Crystal balls, particularly variants such as the evil <PERSON>'s mirror on the wall and <PERSON>'s Palantir, are basically cellular phones, with all the attendant powers and vulnerabilities of that device. The idea of cutting someone open and performing surgery on them to someone working with a humoral theory of human physiology will likely seem magical, as you are (to their understanding) correcting the flow of vital essences around the body. To the anachronistically Cartesian-dualist medieval fantasy mind, surgery is sorcery.
But there are other concepts of magic less conducive to identifying technology as magical in nature. 72
For instance, if you have a basically animistic belief system, your cell phone doesn't resemble magical spirits as they conceive of them, it's more like a type of creature, even more-so considering an automobile or jet. Now, if you revealed to them that these creatures are not just tamed by these strange foreigners, but actually created by them, you're probably going to disrupt their core metaphysical beliefs and wind up identified as some sort of creator god. But probably not a "magic" spirit, you come at those another way.
Chaos Magick is a pretty recent development in occult thought, but the concept of magick (family of concepts really, as chaos magick is utterly pragmatic and practitioners change their favored concept as often as their underwear in order to better game themselves in different circumstances) it promotes usually involves something like modifying probabilities, fetching information from other universes/our future mind/a god, demon, or saint who likes to do fetch quests, or even just influencing which of the possible futures you or we actually wind up in ("Sorry, alternate selves, you should have invoked better!") This kind of concept of magick seems less likely to identify technology as magical in nature, but at the same time is very likely (i.e. in fact does) assimilate technology into magickal practice. For instance, there are certainly several apps in smartphone marketplaces that will simulate a tarot deck or rune casting. And chaos mages are probably the only ones using them, since they're the mental contortionists who can actually spin a criticism of pseudorandom number generators into an argument for why e-divination is even better than the 3D variety. 227