Apple issued a statement concerning iPhone 4 signal issue. Basically it recommends that you just don’t hold it near the lower left corner, now thats a pertty technical solution!
“Gripping any phone will result in some attenuation of its antenna performance, with certain places being worse than others depending on the placement of the antennas. This is a fact of life for every wireless phone. If you ever experience this on your iPhone 4, avoid gripping it in the lower left corner in a way that covers both sides of the black strip in the metal band, or simply use one of many available cases.“
Also, Steve Jobs had sent a replay to one of the users concering the same problem saying:
“Just avoid holding it that way.”
So there you have it. Problem solved >.> (Holding sarcasim sign.)