Donald Trump started a brief Twitter fight with T-Mobile CEO John Legere Saturday night.

At first, Trump complained about poor T-Mobile service in New York. What trump fails to realize is that you don't choose what wireless carrier is available in your building. The signals are blasted all over the city for any subscriber to use.

Here's the tweet:

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Legere responded by saying he wouldn't stay in Trump's hotel:

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Legere sent a bunch of other tweets poking fun of Trump, whipping up his followers to support him in the process, but you get the idea.

In the end, it's just a silly war of words between two high-profile businessmen.

--This story first appeared on Business Insider.