After testing three iPhone 4s in the controlled environment of a radiofrequency isolation chamber, Consumer Reports engineers confirmed that there is a problem with the iPhone 4’s reception. In the RF room, which is impervious to outside radio signals, the test engineers connected the phones to a base-station emulator, a device that simulates carrier cell towers. The engineers also tested several other AT&T phones the same way, including the iPhone 3G S and the Palm Pre. None of those phones had the signal-loss problems of the iPhone 4.

When the user’s finger or hand touches a spot on the phone’s lower left side, the signal can significantly degrade enough to lose the connection altogether. Due to the problem, Consumer Reports determined it could not recommend the iPhone 4.

See a video of the iPhone 4 design defect being tested.

    Meanwhile, Spencer Webb, president of AntennaSys, an antenna design, integration, and consulting firm, says he ran tests on the Apple iPhone 4 antenna and reached the conclusion that the iPhone antenna is not affected by how users hold the phone.

Read more at PCWorld.Com

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