QUOTE(blackchides @ Jun 18 2008, 03:09 PM)
Erm right and wrong. The black plastic of the 1st gen iPhone helps a lot but the aluminum body of the phone creates a Faraday cage which blocks out/in electrical fields. So in comparison to the all plastic back, the signal quality of the 1st gen iPhone will definitely be inferior, for want of a better word, compared to the 3G iPhone.
In fact, Gizmodo/Engadget writers who have played around with the new iPhone have said that voice clarity and signal reception is better relative to the 1st Gen iPhone (I think they did an on-the-spot comparison, not sure) so yeah, theory proven in a way..
Mmmm wrong and right again. A Faraday cage effect happens if the antenna is
enclosed in the aluminum cover of the phone where as the reception antenna of the iphone is on the bottom part where the black plastic casing is. Thats why only that part is plastic. Being near to an aluminum wont generate the Faraday effect. I'm sure the engineers at apple also figure out about the faraday cage effect.
The new 3G phone supposedly have a better reception not because it have a full plastic back cover but MAYBE an improve internal antenna compared with the previous iphone. They wont be using the same antenna in a new phone right? BTW .. 1 or 2 test by Gizmodo/Engadget is not a measuring stick to a prove a theory. To prove this, the phone must be use widely and confirm by users. Maybe that time when they test, the signal was strong there.
As a conclusion ... if the reception quality is better (not yet proven), then it might be because they use an improved antenna compared with the old one and not because of the plastic back cover. We won't know until we can see the internal part of the new phone (looking forward to dismantle one ... if have the chance).