Q: The iPhone 5 uses Cellular Data over WiFi?

It's happening to all the phones in my family. The 2 iPhone 4Ss and my 5 — all running iOS 6. All on AT&T.

Well now, this is weird ... I too saw an unprecedented data spike in August on iPhone 4S 5.1.1 on AT&T.

AT&T and Customer Service = Does Not Compute.

      Last week's call: "I'll fix everthing and not charge you for overage." Nothing happened.

      This week: "Not our phone, let me connect you to Apple."

Apple states "iPhone cannot use cell data if it's *plugged in* while asleep."

Meanwhile, I've got everything turned off that might want to connect by itself, including iCloud and Location Services, except for Find My Phone. Mail is on manual.

Be sure you've got some time and plenty of patience before getting involved with AT&T. Really. Maybe wait for a carrier update ...

Apple says they have put out a software upgrade to fix this issue.  Is this true.  I received my IPhone 5 last night, but I am still waiting for my sons to come in to get them both activated.  I got a black 32 GB, and my son got a white 16GB.  I ordered them on 9-19.  The ship date on my sons is 10-5-2012.  So I am hoping they get this fixed soon.   If you have verizon what data plans are you guys using?  I would like to stay with the 5GB.  I have a rock solid WIFI at my house.  I want to turn my sons data off and he will only use WIFI.  Thanks Everyone

They may have put out one for VERIZON, but nothing has changed for the poor souls with data suckage problems on AT&T.

I am experiencing the same issue with my AT&T iphone5.  I called Apple and they said tuen off cell data and also told me to call AT&T.  I contacted AT&T and they said to contact Apple.  Really?!?!  AT&T also said to try a back up and restore through itunes...anyone heard of this fix, tried it, and if it worked?

That would be a huge waste of time.  I've done a full restore to my iPhone 5 for a different reason but it did nothing to Change way the phone was consuming data.  Besides Verizon put a patch out for their carrier software on iPhone (5).  So if just doing a restore fixed the data problems that's probably all they would have us do.  Your carrier IS aware of the situation.  They're just NOT helping you.

My wife and I are also experiencing the same issue with our AT&T iphone5s.  We are both connected to wifi at least 80% of the day, yet our data usage continues to skyrocket out of control.  My phone indicates usage of over 10 GBs of data in the last week alone, even though I use no data-intensive apps over LTE.    

Even more bewildering, when I log into my account on at&t's website and look at my cell data usage, it only shows usage of 200 MBs for the entire billing period. 

So, is the phone actually using data when connected to wifi, or is the iphone's own cellular usage data incorrect, or BOTH?  If it was the former, then why in the world would at&t's website only report 200 MBs of data usage?

WORD! I downloaded the Verizon patch....

Hello fellow iPhone 5 AT&T users,

I just got of the phone with AT&T & with Apple.  Apperantly Apple engenners are working on a fix for this for AT&T customers (this is what was told to me).  Verizon customers already got a fix: http://support.apple.com/kb/HT5526 (Carrier Version 13.1), AT&T customers only have (Carrier Version 13.0).

I am now trying to communicate with AT&T to get credited for my data usage which like everyone else has spiked since I upgraded.  I suggest all AT&T customers dial 611 from your iPhone 5 and when pormpted, dial '1' then '6' then '0'.  You will then be asked to list the last 4 of your SS# (primary account holder) and then wait for a representative to answer the phone.  Good luck, 10 minutes and still waiting

@Lobsterfan Could your phone be reading your total data, WIFI + AT&T data= what your phone is saying?  Then you have only used 200MB of data with AT&T and then the rest would be WIFI data?  Just a thought. 

@BrentfromGalloway di the verizon patch work? 

So far the Verizon pitch seems to have worked for me.  I'm no longer seeing big gulps of data while I'm asleep.

@groces1bremen - I thought that might be possible, but the figure that it is supposedly giving is just limited to iphone cell network data...

again, very bizarre that the amount of data at&t reports and the amount that the iphone itself reports are so dramatically different.

Just got off the phone with AT&T. They refuse to acknowledge the problem. I racked up 400Mb in one shot, when normally I use about 15 Mb a month! Went to Apple store genius bar, and they reset the phone. Hope it solves the problem.

I'm turning off cell data until Apple & AT&T acknowledges the problem!

Just my two cents...but this is a recent chat transcript between myself and at&t:

You are now chatting with 'Nick Cedillo'

Nick Cedillo: I will be happy to assist you today.

Nick Cedillo: I understand you are having issues with data usage. Is that right?

Chet Lewis: thanks, yes - just wanted to add my name to the growing list of customers who have noticed enormous data usage stats since upgrading to iphone 5....Spoke with Apple and they advised they are aware of the At&t data issue and are working on it but I needed to let my carrier know I was also aware...

Nick Cedillo: Ok thanks for that information. I will make a note of this on your account. Apple should be releasing a software update to resolve that issue.

Chet Lewis: very good....thanks for your assistance Nick....