I'm currently abroad and my carrier is charging absurd fees for data plan. I decided to turn off completely cellular data and rely only on WiFi but my iPhone is still using few KBs of data every day.
I have reset the usage statistic last night and found out iPhone is using my cellular data for "DNS service" under "System services". How do I prevent this from happening?
My carrier is charging 5 EUR, EVERY DAY because of this!!! It happened already 4 days in a row.