Image: Warren Buffett Tencent Francisco, according to foreign media reports, as Apple's fifth largest shareholder, Warren Buffett is confident about the future of iPhone. To this end, he gave himself a vivid example. "When I bought iPhone, I'm afraid the smartphone market is really finished, because I'm sure it's the last person to use a smartphone." Buffett said. God is not a joke, although he held $23 billion worth of apple stock (134 million shares), but they are still using outdated clamshell Samsung mobile phone. Most of all, he had no desire to change a smartphone at all. "This year Tim Cook sent me a Christmas card again, and he said he would have to sell me a iPhone this year." Buffett said. "In fact, every year Cook sends a similar Christmas card to remind me to change iPhone quickly." Buffett has been holding apple stock in 2016, holding with him.