I am wondering if this is the backup of the phones app data and text messaging. I would guess, it would use wifi instead of data if you are connnected though.
You could turn off data before you go to bed and see what happens the next morning. Just to be sure, you said it was both phone's or just your wife's?
Thought the same thing too. But my wife doesn't have hers set up to backup anything, and we don't have a text messaging plan (so there's maybe 1 or 2 txts per month), she doesn't have many apps installed (aside from the weather channel) and she doesn't take pictures with her phone. She basically uses it to check the weather before she leaves the house, and get her emails. And it ONLY happens between 12:00 and 1:00am There are multiple days, where she will not leave the house, and the data will show that at 12:xx for 3 days in a row, data was used, yet NO other data at ANY other time throughout those few days, so I know the wifi is staying connected. I have been keeping my Cell data turned off, but Yes. If I turn mine on, it does the exact same thing, and at nearly the same time as well.
for example. Here is my phone
06/30 | 12:25 AM | phone | Internet/MEdia Net | Sent | 1440 KB |
And here is my wife's on the same day
06/30 | 12:30 AM | phone | Internet/MEdia Net | Sent | 3261 KB |
I have noticed some other posts on here of people with limited data plans going over their limits. Again. it ONLY happens between 12:00 and (well, actually 12:59) It NEVER happens after the 12:00am hour.
So, can some other people...even if you have an unlimited or multiple GB plan, please look at your AT&T accounts...or other accounts, to see if you have some data usage between 12:00am and 1:00am while you are on wifi? I'm trying to figure out if this is a windows phone thing, or an AT&T thing, or if somehow my phones are messed up. If it's an OS problem, that's not cool! If I had the data sense, that might shed a little more light on what is happening!
Thanks,
pez