I recently set up my new iPhone 17 Pro Max by transferring data from my old iPhone 17 Pro Max. I was at home with both phones connected to WiFi and used the setup wizards to perform the transfer. After transferring some data via WhatsApp and Signal, I noticed my cellular data plan had dropped from 150GB to just 25GB, which seemed impossible. It felt like I lost around 125GB just by switching phones. I later found out that my cellular plan reverted back to 150GB after some time, leading me to wonder if I mistakenly used cellular data during this process or if it was just a glitch on my provider's end. Can anyone shed some light on this?
2 Answers
Nope! When transferring between iPhones, the data should only move over Bluetooth and WiFi, which is why they need to be close. There's no way that transfer alone could use up so much cellular data.
It sounds like you might not have had a stable WiFi connection during the transfer. Normally, it should connect to WiFi automatically, but if there was any hiccup, it might have defaulted to cellular for some tasks.
I was already on WiFi before transferring my eSIM, so I doubt there was an issue with connecting.