It's logical that T-Mobile would have their 'best-and-brightest' sales representatives in high-visibility locations like Costco Warehouses. Costco members expect high quality products and courteous, efficient, informative advice from sales consultants. T-Mobile's operation in Costco has certainly provided the best quality in these regards with Mobile Expert, Preston Studebaker! Any cell phone company can sell you a phone -- but if you also want expert advice concerning YOUR specific needs and wants, YOUR interest in getting the best product for your money at the best price, YOUR expectation for the best service in both performance, and all the "back-office" handling of contract specifications, special offers and sales events, and other aspects of the customer-facing experience that affect YOU, you want to ask for Preston Studebaker at the T-Mobile sales operation at Costco! This remarkable young man has the knowledge, the experience, and the right instincts to make YOU the center of attention as he makes certain that every aspect of the purchase of your smart phone is exactly what YOU expect and want. And, if and when you have questions after the sale regarding special sales promotions, rebates, and all the terms and conditions, Preston is right there for YOU, with answers that make sense and satisfy. I know all of this by experience with Preston, and when my wife and I upgraded our T-Mobile phones to newer ones -- followed shortly afterward by T-Mobile migrating all of us on the Magenta Plus Unlimited plan to a new one, Preston will be right there to help with all aspects of how that affects our upgrade and the details. The next time you're at Costco, stop over at the T-Mobile kiosk, so very ably and professionally run by Store Manager, Jasmine Salazar, and ask for Preston Studebaker. You will surely look back on this as being some of the best advice you ever got regarding your personal communication needs!