Update: As of 15 December 2019 - wuntu has closed.
Three have seen that their users want something a little different to what wuntu can offer at the moment, so they'll be doing some work to find better ways of rewarding their customers.
The free Wuntu app provides offers each week, ranging from food and drinks, dining out, beauty products and services, cinema, movies, days out, travel, fashion, competitions, prize draws, and more – they have something for everyone.
You don't have to use the offers there and then either, you can save them in your app wallet for later use, although be careful not to miss out as some offers are limited in number or have an expiry date.
And if you are wondering, why the name Wuntu? Well it's Wun-tu-Three (get it?).
For O2 mobile customers, check out O2 Priority Rewards.
For Vodafone mobile customers, check out Vodafone VeryMe Rewards.