According to a report by Changewave, Verizon getting the iPhone is making AT&T customers antsy about switching. Only 4% of Verizon customers plan on switching in the next 90 days. About 10% of Sprint/Nextel customers want to switch. And 15% of T-Mobile and AT&T want to switch. AT&T customers mainly want to switch because of poor reception, poor coverage, and dropped calls.