Over at the Fido Technical Community forums, the moderators there have concluded the widespread bug in iOS 6 related to data usage while being on Wi-Fi doesn’t exist, as the team is unable to pinpoint the problem:
Fido has confirmed that there is no issue. The data issues (where Wi-Fi connected phones are using mobile phone network data) reported in the U.S. do not apply to our OS version.
It is important to note that with the high download / upload speeds with LTE, data may be consumed at a quicker rate.
You can use the Fido My Account App to track your usage directly from your phone.
If you believe that there is an issue, we’d suggest that you bring it to an Apple store to have your phone checked.
We first highlighted this problem back in early October as it affected users on Rogers, TELUS and Bell as well. All of these carriers confirmed with us directly that the problem that originally occurred in the U.S. does not affect users in Canada. However, users in Canada still refuse to accept this conclusion since third party data tracking apps have noticed data usage while on Wi-Fi.
Some users have been able to pinpoint iTunes Match or Apple’s Podcast iOS app as the culprit for these data leaks over Wi-Fi. Are you still suffering from this iOS 6 bug?