How do I stop system services from using Mobila Data IOS9
I updated my 5S to IOS 9 a couple of days ago. But ever since then it has just absolutely devoured my data plan and its made lte absolutely useless for me. I only pay for 500mb a week on LTE and it was completely sufficient before the update. But I tested turning on mobile data and leaving my phone idle and the General in System Services had used up 100mb in just 20 minutes. I turned off location services in privacy. Turned off wifi assist and disabled mobile data for all appstore updates and all other apps except facebook and whatsapp which I primarily use on LTE. Is their any way to stop system services from downloading that data in the background
iPhone 5s, iOS 9