Why is my iPhone X taking up so much bandwidth on network?

[The.316]

I recently upgraded my internet here where I live to 100/10. For the most part, I get around 90/10 on my ps4, my iMac, and Macbook. When my iPhone is on, my Wifi drops to 40-50mbs. For example, I turned off my iPhone and ran a test just now, and I was at 85/9, but when I turn it on, Im at 45/9. I thought maybe my phone is uploading or downloading anything, which is effecting the network, but I am not sure how to check that. My PS4 Pro is connected to the modem/router via ethernet, and that is a stable 90, so it has something to do with the Wifi, but I just have no clue. Any suggestions?

 

[chimelime]

You’ve checked which apps are running in the background?