Following the release of the HTC One, two variants were released to form a trio for the 2013 HTC One lineup. A smaller variant named the HTC One Mini was released in August 2013, and a larger variant named the HTC One Max was released in October 2013. Similar in design and features to the HTC One, the upgraded aspects of the One Max include a display measuring , a fingerprint sensor and a removable back cover for expandable memory. The product was released into the European and Asian retail environment in October 2013, followed by a US launch in early November 2013.