Some people who know a lot about business and phones think T-Mobile US will do well in the future. They are putting their money where their mouth is by buying something called "options" on the stock market. This is a way for them to say "I think this company will do well, and I'm willing to bet money on it." They are not just buying regular parts of the company (called "stocks"), but they are also betting on how high or low the price of the company will go. If they are right, they can make a lot more money. But if they are wrong, they could lose some money. Right now, some people think T-Mobile US will go up in price, so they are buying options that let them buy the stock at a lower price. This is called a "call" option. Other people think the price might go down, so they are buying options that let them sell the stock at a higher price. This is called a "put" option. Some people are also buying a lot of these options, which means they think the price of the company will move a lot. This is called a "large trade". Overall, some people think T-Mobile US will do well and they are betting their money on it. Read from source...

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