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