3. The phone sends off the sensor and manually entered data via the GSM network. We are planning to use NOKIA’s life tools service that is targeted at farmers in India. Their interactive information system is based on the exchange of SMS messages. Revenue sharing with the provider makes for a usage based business model. Challenges for potentially illiterate users pairing the sensor box with the mobile installation and calibration of sensor box data entry on the phone (crop, soil type) retrieving data from sensor box receive and review outcome scenarios re-installation of sensor box changing of batteries in sensor box mobile phone coverage outages navigation of application on mobile device through audio feedback