Sprint on Friday confirmed that today’s iPhone launch has resulted in the carrier’s best-ever day of sales for a device family. “Sprint today reported its best ever day of sales in retail, web and telesales for a device family in Sprint history with the launch of iPhone 4S and iPhone 4,” Sprint’s product chief Fared Adib said in a statement sent to BGR via email. “We reached this milestone at approximately noon CT/1pm ET. The response to this device by current and new customers has surpassed our expectations and validates our customers’ desire for a truly unlimited data pricing plan.” Sprint subscribers have been clamoring for Apple’s smartphone for years, and pent up demand looks to have made for quite a launch day at for the carrier. Some analysts, such as Yankee Group’s Carl Howe, believe Apple could sell as many as 4 million iPhone handsets across all carriers this weekend.