The iPhone 4S is not having a serious impact on Sprint's 3G data speeds, the carrier claims. Since Friday's 4S launch some Sprint subscribers have complained of lethargic 3G, potentially as slow as 300 to 500Kbps down. The issue appears to be affecting all phones, not just the 4S, but the popularity of the iPhone combined with a sudden influx of new customers could be sapping Sprint's bandwidth.
