Essentially the "0147" triggers the premium service charges in the billing system so depending on your "plans and bundles" it will probably be cheaper for wifey to ring you.

Be aware that if the call doesn't connect it should (or at least it used to) lodge a missed call message which costs you 50 cents (give or take) PLUS you need to access the message at your Satellite Rate to get the message to see who it was.

I just ignore messages but you still get the lodgement charge (assuming that is still the current way of doing things).