World leaders' mobiles

The powerful leaders of the world cannot use mobile phone frequently like common people. They have to be tricky and at the same time picky to choose their mobile brand and model. But most of the time mobile phone choice of the world leaders is more telling than just revealing their operating system preference.
Long-time advocate of the BlackBerry president Obama is rumoured to be considering switching to an Android-based smart phone.
Models from Samsung and LG are being tested by the White House as viable alternatives to the BlackBerry.

Both Mr Obama and prime minister David Cameron insisted on keeping their BlackBerries when they joined office, despite security concerns surrounding hacking, espionage and data theft. BlackBerry's network is considered to be the safest and most secure of the smart phones, resulting in the company being the White House's primary choice for more than a decade.

German chancellor Angela Merkel uses the BlackBerry Z10. Previously, the German chancellor had been using a Nokia 6210 Slide from October 2009, before switching to a Z10 in July 2013.

Hillary Clinton is another notable BlackBerry fan.

French president Francois Hollande is an iPhone 5 fan, which he uses to conduct Presidential business.

Russian president Vladimir Putin long denied owning a mobile phone, saying in 2010 if he did own one, it would "keep ringing incessantly."
However, since 2012 Putin has been pictured using Android-based MTS-Glonass 945, which is claimed to be Russia's answer to the iPhone. North Korean leader Kim Jong-Un favours the HTC Butterfly over his country's manufactured Android-based Arirang smart phone.Thailand's prime minister Yingluck Shinawatra is believed to own five smart phones, including an iPhone 5.
Bangladeshi prime minister Sheikh Hasina is an Android-based smart phone fan. She uses smart phone of Galaxy series.