U.S. Pres. Barack Obama, leader of the free world, has reportedly not allowed the use Apple's iPhone for security reasons. The Pentagon and the U.S. Department of Defense might have given Apple's iPhone security clearance for official use but the smartphone is apparently still not secure enough for Mr. Obama.

According to Reuters, the American president still carries a Blackberry 2007 model. When Pres. Obama was first elected in office, he insisted on keeping his Blackberry but now he can't get rid of it and use Apple's iPhone.

It is only most governments worldwide that has kept the long-time struggling Blackberry afloat. According to German officials, they do not want to use the iPhone for security reasons. Germany placed a big order for Blackberry phones earlier in 2013.

Apple's iPhone and iPad had gone through Pentagon and they were declared safe to use. However, security experts had questioned the security of the gadgets. Apple Insider reports said Apple products have a low-level cryptographic certification which means the iPhone is not safe for the security levels needed by the President.

Despite not having being allowed to use Apple's iPhone, Pres. Obama has made it clear that he likes Apple devices since both of his daughters have iPhones. The president has been seen using an iPad and a MacBook Pro for personal use, but it is doubtful if he will use them for official business.

Blackberry has been struggling with its dwindling market share after the failure of Blackberry 10 devices to jumpstart the brand. Blackberry phones are known for high security which convinced the world's governments to make them their official phones.

Despite not fit to be used by U.S. President, Apple still remains popular in America. Apple's iPhone sales represented 21 percent of world smartphone sales. In the U.S., the Android market captured almost 53 percent of sales. In European countries like Germany, UK, Italy, France and Spain, Android captured 71 percent of sales, according to Kantar data.