Magazine : 
10 World Leaders And Their Smartphones
U.S. President Barack Obama
The first African American President of U.S. – Barack Obama, his government doesn’t allow him to use any other manufactured handsets. Because of the security measures Obama uses the most secured Smartphone in world – BlackBerry, with extra features that are exclusively meant for the U.S. President.
British Prime Minister David Cameron
When we come across security, even British Prime Minister David Cameron uses identical piece of gadget that of U.S. President Obama. That’s right, David Cameron also have a BlackBerry device specially designed for him.
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