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Dan Hesse tells Cramer that business is so brisk, he can barely keep up.

It appears people want the new iPhone and they want it on Sprint. "We're beginning to run out of inventory," Hesse admitted to Cramer during an appearance on Mad Money, "especially the 5S."

Hesse's comments suggest that buyers of the new iPhone, which comes in multiple colors, are drawn to particular hues. "We are out of a number of them already," he added.

Perhaps buyers are also drawn to Sprint's competitive pricing.

At Sprint, customers buying the latest Apple device pay a monthly fee of $27 for the device on top of a monthly service fee of $65, plus taxes and a one-time fee of $36 for device activation.

Sprint said its $65 monthly service fee most closely compares to $110 per month plans at AT&T and Verizon.

And according to Hesse the Sprint network is stronger than ever.

"We're spending 8 billion a year on capex," Hesse told Cramer. "We're spending a lot of money to make sure the network is great. Our goal is to build the best network of any carrier in the world – we'll have that when we're done."

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Now that Sprint has consummated its deal with Softbank, selling 78% of the company for $21.6 billion in cash, the carrier appears to be moving full steam ahead with its plans to finish building out its ultra-fast next generation 4G LTE network.

"Sprint is no longer merely the third-wheel of the wireless world," Cramer added," it's become a contender."

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