Gurgaon-based mobile startup Y2CF Digital Media Pvt Ltd (Y2CF), which was rumoured to be the maiden venture of Bharti SoftBank (BSB), a mobile Internet joint venture between Bharti Enterprises and Japan's SoftBank Corp, has now confirmed its links with BSB. The firm said it has partnered with BSB to launch Hoppr - a location based check-in service that works across all mobile devices. The service basically allows users to explore rewards and offers available with brands and merchants in their vicinity.