Fido

I have an account with Fido with 2 numbers/plans  - mine and my wife's. My wife has more data, yet she uses very little, therefore my question is  - can I switch the plans arround with her or just transfer her plan to me and get her any another plan?

Every few months (1-3 times a year) I supposedly go over my data limit of 6GB.  It usually plays like this, one day all of a sudden I would go from my usual usage of 50-200MB/day to a 990MB in 1 day!    First of all, I know I did not use that amount!...