Find a used T-Mobile cell phone for sale by visiting the Certified Pre-Owned page of the T-Mobile website or by searching on sites such as Glyde, eBay and Amazon.com. Phones purchased from a third party retailer or a private seller should always be checked to make sure they function properly.
To buy a used cell phone directly from T-Mobile, customers need to visit the company's New2U online store, where it lists a wide selection of used phones inspected and certified to be in acceptable working condition. Phones purchased through this store come with a satisfaction guarantee from T-Mobile that allows the user to return the phone if they experience any issues or dissatisfaction. Amazon.com also offers its customers the option to return phones purchased through its site in the event of a problem or malfunction.
Regardless of the site used to purchase the T-Mobile cell phone, buyers need to perform research on the different types of phones to avoid overpaying. Buyers should compare prices of the same model of phone, across different sites, to gain an understanding of the current accepted value. Auction site eBay also allows users to view historical purchase data to see the exact prices real users paid for items in the past.