o2 Germany introduced a new mobile contract: o2o. We were asked to develop a campaign which would explain the contract in an entertaining and simple way. This was the first flat rate contract in Germany. Our solution was to ask a simple question in teasers: “What do you think about, while on the phone?” The brand ads explained, that you need not think or worry about your phone bill because you can never be charged too much since o2o is a flat rate contract. Visually supported by doodles since, everybody doodles while on the phone.