Can an iPhone knock my own devices off the wi-fi? [View all]

[Marthe48]

My granddaughter stayed with me. She has an iPhone. I have a laptop, an android phone and a smart tv. I've noticed this happened other times, but yesterday was really bad. I couldn't use Google. I lost the connection to my wi-fi on the laptop. I tried to access Netflix on the Smart TY and it wouldn't connect. I couldn't get my tethering to work, either! When I'm by myself, this doesn't happen. I finally asked her to turn off the wi-fi on her phone, and we had no more trouble after that.

Is it normal for an iPhone to dominate someone's wi-fi? I've had the same problem with other iPhones in my house and their house.