Netflix began its subscription streaming service in 1999 and has since expanded globally, with over 33 million U.S. subscribers alone by 2013. This widespread availability has benefited producers through increased revenue from subscriptions but also presents some disadvantages like differing release times for content between countries. The introduction of streaming on unlimited devices removed prior restrictions and helped Netflix attract more customers. High definition television transmissions began in the 1990s and became more widely available in Europe in the late 2000s. HDTV provides audiences with better picture quality but costs more for producers due to technology. Mobile devices like the iPad, released in 2010, allow media consumption on the go and simplify connectivity compared to earlier mobile phones.