The iPhone 5′s taller design coupled with the device’s dual antenna tech inherited from the iPhone 4S would translate into much better signal reception, according to Spencer Webb, owner of AntennaSys.
Speaking to MacRumors, Webb said that the increased height of the iPhone 5 would mean that it’ll become harder for a normal sized hand to block both the antennas, diminishing the possibility of interference and improving upon the already advanced iPhone 4S antenna technology.
Ergonomically, the taller phone means the average hand won’t be able to cover both antennas. It’s harder to hold “wrong”. Also, since LTE operates at a lower frequency, 700 MHz, the additional separation is even more valuable.
The aluminum body of the new iPhone 5 will also help the antenna performance, and the hand sensitivity issue will be further diminished. The key word is sensitivity. In other words, changes in performance due to changes in “how you hold it” will be diminished. The antenna will see less change in the “ground mass” of the device.
Additionally, he said that LTE’s higher speeds would lead to cellular networks being less clogged, due to web requests taking a much shorter time than 3G. In his words, “traffic gets out of the way faster.”
An influx of iPhone 5 units into the market would also ease off the load on the current 3G infrastructure, benefiting older smartphone users without 4G LTE chips.