Quano Inc.

Quano Inc. decides to produce a 3D-display phone, Chel, which is a much-anticipated release. Raymond and Jenny are among thousands of buyers who queue up outside a retail store to buy Chel on the day of its release. Most buyers are disappointed within a week because of heating issues. Quano announces immediately that it would replace the defective phones with a rectified model. Raymond and Jenny's replacement phones arrive after three months. The new Chel has a few issues that are taken care of by a software upgrade. This prompts a flood of sales. Trevor is one of Quano's regular customers who buys Chel after the software upgrade. In this scenario, Trevor is one among the _____.