The phrase "smartphone king" refers to a company or brand that is highly regarded and successful in the production and sales of smartphones. They are considered the best in the industry and have a dominant position. Full definition
The former smartphone king struggled for its survival for a very long time before transitioning into mobile security and communication software provider. (dazeinfo.com)
And there's no better way to prepare than by taking an early look at how Samsung's new Galaxy S9 stacks up against the current smartphone king, Apple's iPhone X. (bgr.com)
Once again, Xiaomi has shown why it is called the budget smartphone king. (droidholic.com)