iPhone 5s running iOS 8.0.2
I am on a 2GB/month plan so I tend to keep a close eye on cellular data usage. Recently noticed that Settings > Cellular > System Services > Time & Location was almost 300MB in about 20 days. In the past, I have never seen this more than 3-5MB. Checked a friend who has the same hardware & software and his usage has remained under 10MB/month.
What accounts for this high usage? I have background refresh turned off, Location Services enabled only for GPS apps (e.g. Waze cellular usage is around 30MB) and Find My Phone.
What exactly does "Time and Location" mean, which system components use this service and why has the usage shot up 100 times from 3MB to almost 300MB?