In the course of conducting our standard suite of iPhone 4 performance tests, iLounge has discovered that the Verizon CDMA iPhone 4 suffers from signal attenuation problems similar to ones discovered in the original GSM version of the iPhone 4. As seen in this Verizon iPhone 4 antenna attenuation video, the CDMA iPhone 4 can still lose substantial cellular signal strength when held in the prior “death grip” position, as well as Wi-Fi signal…