Sky Mobile offers amazing benefits together with the most alluring data rollover scheme in the UK. This piece will define Sky Piggybank and go over its workings. One of the many unique features that Sky Mobile offers is Sky Piggybank. In actuality, it can be the carrier's most exceptional programme. Sky Piggybank is, in a nutshell, where you save your unused data each month. For up to three years, the rolled-over data is stored in your Piggybank, where you can exchange it for a variety of advantages.