Tim Cook Spent Hours Teaching This Billionaire How to Use His iPhone 11<img style="float: left; margin-right: 10px" src="
![](http://www.iphonehacks.com/wp-content/uploads/2020/02/warren-buffet-194x129.jpg)
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Warren Buffet might be one of the richest people on Earth until recently he was using a flip phone from the yesteryears. The Billionaire is known for his frugal lifestyle and penny-pinching ways. In an interview, Warren Buffet told Yahoo Finance that he got personal instruction from Tim Cook on how to use an iPhone.
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Tim Cook Spent Hours Teaching This Billionaire How to Use His iPhone 11