Following his company's earnings release earlier today, T-Mobile USA CEO John Legere told AllThingsD that the carrier is looking forward to expanding its Apple product offerings beyond the iPhone. Back in April, T-Mobile became the last of the four major U.S. carrier to begin selling the iPhone.Legere said it is a good sign that the iPhone is only a portion of the company’s sales growth, accounting for just 21 percent of smartphone sales last quarter. “I think it’s a healthy percentage,” Legere said. That said, Legere looks forward to more business with Apple, including carrying products beyond the iPhone.