T-Mobile is a subsidiary of the publicly traded German telecommunications company Deutsche Telekom AG. Founded in 1991, T-Mobile is based in Boon, Germany, but serves the United states, Europe and parts of the Caribbean. The company provides cellular service with individual, family and group plans available. In addition to cell phone service, T-Mobile is a provider of mobile Internet services for tablet computers. Businesses and consumers can sign up for plans by visiting T-Mobile stores or the official website T-Mobile.com. Both the stores and the e-commerce store have a wide range of mobile phones, smartphones and tablet computers available for purchase.