In a note published to clients late last week, a survey by investment research firm Canaccord Genuity (via Fortune) revealed that the new iPhone 5s was the top-selling phone at all four major U.S. carriers in September, with the lower-cost iPhone 5c second in sales at AT&T and Sprint. The Samsung Galaxy S4 placed ahead of the iPhone 5c in sales at Verizon and T-Mobile, with the firm attributing strong sales of Samsung's flagship device to price cuts initiated in June. "We believe these price cuts combined with Samsung's aggressive marketing and effective advertising campaign for its existing and new high-tier smartphones, such as the recently-launched Galaxy Note 3, could potentially help Samsung reduce high-tier smartphone share losses t
