Take context from the input text and decide on the accurate relationship between 'Microsoft Mobile' and 'smartphone' from the options provided.
Options: location of formation, product/material produced, creator, parent organization

Ravi Kunwar, Director – North, Microsoft Mobile Devices said, “We at Microsoft are committed to focus on enhancing user experience with our devices and with this new ‘Buyback’ offer we want to enable customers to upgrade to a smartphone that will help them be more productive and stay connected.
product/material produced