To put it into perspective: the concept of a smartphone isn’t even a thing yet plus Steve Jobs wasn’t even born yet (via time travel, you have an iPhone 12 decades before it was released and about 102 years before the first iPhone came out), will they consider you a warlock? The phone itself won’t work as celluar towers didn’t exist yet (you can’t call anybody).

You are in an era where silent films were popular, people wore formal clothing, black & white photography is already mainstream. Your great grandparents are alive at this time, even if you have what they consider alien technology: will you be burned at the stake for just having the device? Having a 4K camera makes B/W photography look like a joke.

The issue will be on recharging the device, since their power outlets aren’t the same as today due to them being intended for the electronics available at the time. You can have a battery pack or wireless charging but run into the same problems (What happens if they break?) Also, what happens if the device is damaged? Where are you going to get spare parts?

Even if you flexed such technology towards scientists, inventors or scholars from that era: will they consider you crazy? Is the government going to coerce you to manufacture such tech as they see it as a potential? That leads into another problem, the components you need aren’t available yet in order to begin manufacturing neither is the knowledge.