A thermoformed package that is specially adapted to allow a cell phone (or similar product) to be partially packaged at one time and place, and then at a later time adapted for sale as a finished product with a particular brand (from a variety of brands or trademarks), and/or with a particular service plan (from a variety of rate plans or payment terms and/or languages) and/or with a particular language (or other localization) at a second time and place.