I have never used more than 1 GB on normal use which includes the iOS 6 betas on my 4S. Only hit my 2GB max once cause I was away from home and had personal hotspot on when my iPad tried to back up to iCloud via the wifi from my iPhone.
So with iOS 6 I have not noticed a significant higher use in data.
iPhone 5 & the new iPad are the only devices right now capable of LTE data speeds. The iPhone 4/4s and below are not capable of LTE speeds.
As for the huge data usage, it could be possible for iCloud to be backing up data to the cloud. If you don't use iCloud, then it's possible that you have been loading way too many videos (YouTube for example), because there doesn't seem to be any logical way to hit that high without watching a lot of videos, and using data in general instead of WiFi.
You can check via iOS or via an official app provided by the carrier. I know Rogers & Fido has their own app for checking & you can also use their respective website accounting management features to check your data usage.
Although, it's worth noting that if you do not reset your data usage every month that is recorded via iOS, you will not know your true data usage for the month. This does not apply to carrier apps because they reset automatically.
Yep, something is amiss. Though it was only amiss the first day.
I checked and six times there was a data transfer of exactly 95.38mb all within 5-10mins of each other the first night I had the phone, around 9pm. No idea what it was, but it put me over my 1gb plan (STILL waiting for TELUS to switch me to my new plan).
27" iMac 3.4ghz i7, 12gb, 1TB + 256gb SSD | 15" Retina MacBook Pro 2ghz i7, 16gb
iPhone 5S 32gb gold His | iPhone 5 black 32gb Hers | iPad Mini Retina 64gb | iPad 3 32gb photo biz | @HalifaxTech
My wife using her iPhone 3G averaged 100MB/month. With my 3GS, I averaged 250MB/month, but I use mine more on 3G as I am not always in the office using wifi.
In June after we upgraded my wife's 3G to a 4S, her data usage jumped to an average of 400MB/month. She occasionally uses Siri, but my best guess for the increase is she also began to use iCloud for syncing and backups.
I upgraded my 3GS to the iPhone 5 on the 21st launch day, and have so far used 300MB of data (10 days). I was using iCloud on the 3GS, so my increase is harder to pinpoint, but my guess is the newer phones just use more data.
Our previous plan included 1GB of shared data, and before I upgraded to iPhone5, we moved to 6GB of shared data (and somehow saved $26/month on our Bell plan).
So as of today, I'm not worried about my data usage increase, unless somehow I hit the 6GB mark