Design membership cards that can satisfy various customer groups categorized by age, sex and call pattern. Make sure each card highlights the identity of the 'T' brand.

All the designers have their own cell phones, given Korea’s nearly 100% mobile phone subscription rate. Thus, to them, designing a handbook that helps salespeople give customers the most convenient experience was not a challenge. Aware of the project purpose, the designers came up with a final design that is highly efficient.

Initially 10,000 copies were printed but an additional 15,000 were published because of the many requests from employees. The pamphlet is also being used by those who are not sales representatives and executives. Employees even have trouble refusing customer requests for a copy.