Separate IHS iSuppli and Strategy Analytics studies Friday have backed Apple's rapid return to the top of the smartphone space in the fall. Determining that Samsung had shipped 36 million smartphones, slightly higher than Samsung's preliminary estimates, IHS iSuppli put Apple's 37 million iPhones just on top. Although Samsung nearly quadrupled the amount of smartphones it shipped and moved more year-long, Apple's higher starting point meant it could just double its yearly shipments to stay competitive.