A recent report suggested Apple’s (AAPL) latest iPhone reclaimed the title of top-selling smartphone in the world last quarter, and the popular handset apparently maintained its momentum in the U.S. last month. Canaccord Genuity analyst T. Michael Walkley issued his monthly handset sales estimates for the month of February early Monday morning, and he found that Apple’s iPhone 5 was the best-selling smartphone at each of the three major U.S. carriers where the phone is sold.At AT&T (T), which sells more smartphones than another other U.S. wireless company, the iPhone 5 topped Samsung’s (005930) Galaxy S III and the Nokia (NOK) Lumia 920, which