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.
In the context of the input sentence, determine the relationship between 'Microsoft Mobile' and 'smartphone'.
Options: product/material produced, parent organization, creator, location of formation