Samsung Electronics has shipped over 20 million Galaxy S4 smartphones. The S4 launched 68 days ago. This makes the S4 the best selling Android smartphone in history. Samsung’s mobile head J.K. Shin has confirmed the number according to Korean news company Chosun. Although this is a large number, Samsung has not matched the iPhone 5 in terms of shipments. The iPhone 5 hit 34 million shipments in 100 days and the iPhone 4S hit 32 million shipments in 79 days.