Apple currently controls these centers, although some function as dropship facilities for the major cell phone companies that account for the large majority of iPhone sales. Apple currently produces and stocks a limited quality of iPhones at any given time, meaning that when a new phone is introduced, limited quantities are available due to the go-to-market strategy used by Apple. The distribution phase of the product lifecycle is managed by Apple headquarters in the United States, but the product is distributed worldwide. Product marketing and customer service are also handled directly by Apple. These marketing and promotion strategies must be carefully examined in order to provide the best qualities in the team and product profile clearly and clearly