At Verizon, spokeswoman Brenda Raney didn't even refer to the iPhone 5: "Verizon Wireless network engineers prepare, maintain and operate our nationwide wireless network to optimize our customers' experience with a keen eye toward consistent reliability and performance. We work hard to ensure that our 3G and 4G networks are ready to support the devices we sell to our customers. Our customers expect a great experience on the Verizon Wireless network - we know that and third-party surveys support our superior network quality, including from RootMetrics and JD Power."

At Sprint, spokeswoman Michelle Mermelstein said: "No issues have been reported [with the iPhone 5] and nothing is expected. Our network is ready to handle the LTE traffic we expect with iPhone 5."

Matt Hamblen covers mobile and wireless, smartphones and other handhelds, and wireless networking for Computerworld. Follow Matt on Twitter at or subscribe to . His email address is .

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