I have experienced normal use with my iPhone 5 until Monday, the first day of my new billing cycle. Rogers changed my billing to match the aggressive FIDO voice/txt unlimited plan @ $56 per month with 2GB data.
So I checked my billing and usage on Monday evening to find that my phone had consumed 3.3GB of data! Most of my day had been spent on wifi too.
Phoned Rogers technical who created an incident report. They acknowledged it was not my fault and told me to call billing in the morning. They also mentioned this is a known issue with Apple devices regardless of carrier and that Apple was working on a fix. Tuesday morning I called billing who adjusted my account to give me unlimited LTE data into March.
So the good thing is I have a truly unlimited plan for 3 months!