I have bought an XPeria Z Ultra about 2 weeks ago, and am coming from an iPhone 4. I am quite happy so far except for one thing. Unfortunately, this "thing" is bad enough as to put me off and get me thinking about going back to apple, or possibly to a windows phone.
I have recently changed to a prepaid account with my carrier, and it charges me a given amount whenever I use the mobile network for data. I have tried to limit the usage to Wifi only, but so far, there is always some random app that keeps using 4G - even when I am at home, and connected to wifi.
I have searched for a few days already and have found no way to limit mobile data access on a general basis. So, my question is:
How can I make sure ALL apps access data via wifi whenever they need internet access, regardless of the time? I don't want to use an app to control that, and I have tried all the options I found for data restriction/etc.
Right now what is working for me is exactly that - a woraround, where I have entered a bogus string for data configuration so that the phone simply -cannot- connect at all. But I can't believe that this is the only solution. I just can't.