I activated a data plan on my new HTC HD7 today and on my way home from the shop, I checked a single text only webpage. I was operating only on 3G for about 3 hours. Once I got home, my phone was on my local wifi network, so I left the data option activated, as wifi has priority.
I logged on to check data usage, several hours after adding a data plan and I had used 16MB in 3 hours. Please tell me what in the world the OS is doing to send out that much data in three hours?
Please keep in mind that I was not accessing any appliations. Other than going to that single webpage, my phone was simply sitting in my pocket. I've talked to three other WP7 users all with different handsets on different networks and they all have the same problem.
What I would specifically like to have answered is this:
1. Which applications are using this phantom data? Is it the collection of facebook and e-mail accounts that I've integrated into the People hub? Is it the applications I've installed (but haven't even used yet)? Is it the location services?
2. Although wifi is given priority, does data still get used even though the phone might be connected to a wifi network? I have read anecdotal evidence of people having this problem and while I know the official answer is that wifi takes priority, it isn't being borne out in reality for some people.
Although I am a completely reasonable person, I'm actually quite angry about this, as here in Canada data is prohibitively expensive relative to almost every other country in the world, so if anyone has any more information about this, it would be much appreciated.