I too have been experiencing this problem. To give you an idea of my original usage, I usually use less than 300 MB per month. But, since I bought my iPhone 6 on September 28 at 11am, my iPhone 5 has been consuming data fast and furious. To better quantify here are some observations:
All figured in MB, using report Verizon's usage details page.
09/28/2012 | 12:12 PM | DATA SHARE TALK & TEXT | 1.91 |
09/28/2012 | 1:54 PM | DATA SHARE TALK & TEXT | 0.00 |
09/28/2012 | 2:00 PM | DATA SHARE TALK & TEXT | 0.69 |
09/29/2012 | 2:06 PM | DATA SHARE TALK & TEXT | 22.88 |
09/28/2012 | 3:55 PM | DATA SHARE TALK & TEXT | 161.20 |
09/28/2012 | 4:06 PM | DATA SHARE TALK & TEXT | 615.87 |
09/29/2012 | 4:14 PM | DATA SHARE TALK & TEXT | 0.03 |
09/29/2012 | 4:31 PM | DATA SHARE TALK & TEXT | 0.03 |
The usuage counter on my iPhone indicates vast majority was downloaded data, not sent.
So for context, in about 10 minutes, iPhone used about 2 times the data that I use in an entire month. I am a light data user. I don't watch videos, download apps, etc. over WiFi.
At 4pm on 9/28/12, while this data was downloaded, I was photographing a lacrosse game (not with my phone so it wasn't streaming). The phone was sitting in my camera bag and I observed it being very hot. The phone in this time period was undergoing only moderate usage by me. Some activities I did include:
- Checking Twitter
- Checking Facebook
- Using the Map to see my location; checking out both map and satelitte view.
- Sending 4-5 text messages; none of them picture texts.
Here are some observations that might help in diagnosing problems:
- My old iPhone 4 was backed up to iCloud. In the Apple Store, using the store's WiFi, the sales associate helped me restore my settings from iCloud.
- After the bulk of the restore was done (photos and apps had not finished downloading, but all the settings, contacts, etc had), I drove back to work where we have WiFi. There, the phone restarted the download process.
- During the 15 minute drive from the Apple Store to work, the iPhone used only modest amounts of data (about 2MB) likely due to me trying the turn-by-turn directions feature to get me back to work.
- Once I returned to work around 12:10 the iPhone immediatly locked onto the Wifi there.
- All the applications finished downloading by the time I left work around 3:45. I do not know about the photos, however.
Here are relevant settings at the time of the excessive data usage:
In the "Celluar" page. Use celluar for:
- iCloud Document: On
- iTunes: Off
- FaceTime: On (never received calls during the time, however)
- Passbook Updates: On
- Readline List: On
LTE was also turned on
iCloud:
- Mail: Off
- Contacts: Off
- Calendars: Off (for mail, contacts and calendars I use Google Exchange)
- Reminders: On
- Safari: On
- Notes: On
- Passbook: On
- Photo Stream: On
- Documents and Data: On Use celluar data: Off
- Storage and Backup. Use iCloud Backup: On
Send diagnostics information to Apple: On
I also have iTunes Match. Of note, I had many difficulties at work downloading some large albums (around 1GB). iTunes Match would start downloading, then stall. Very unreliable. Part of me has wondered if iPhone started to download the albums off LTE (note that I had the function to download iTunes by Match turned off for celluar data -- a carry over from me having a 300MB plan)
Sorry for the long post, wanted to give as much information as possible to try and indentify the problem. Hopefully this is fixed soon. I have had to upgrade to a 2GB plan. I'm afraid, at the current use of data, I am going to have to disable the celluar data function on my iPhone.