A different approach to location-based services is being presented by Stevie Ooi, who is chief locationist at W-locate. While most other services are based on GPS signals (with all the relative problems of this solution, in the absence of signal, for eg. within buildings) their product is based on the SIM card itself, which pinpoints the position of the mobile phone and its owner. He tells us about the first rollout of their special network and device agnostic SIM card in Singapore and Thailand, their plans to pass from a B2B to a B2C selling model and their vision of the oncoming IoT era, where their SIM card will provide a valuable element -location- as an extra dimension in the analytical process of big data. Interviewed by Sakis Triantafyllakis for Tech Talks Central.