@CYaBro The data sharing is only on the carryover plans (https://www.2degrees.nz/mobile-plans/pay-monthly) and from there you get an option in your 2degrees mobile app to data share else it may be hidden in your side menu.

If you're on the unlimited plans then you can't data share - you're better to switch your plan to one of their newer plans. If you can't see sharing in the app you may be either on one of the older plans, or be on one of the older sharer plans with your wife being the lead plan.

On the newer 2degrees plans you both get your own monthly allocation - and ability to share data too. It is a really handy feature.