The highly anticipated iPhone 5 is heading toward its release in October, and Apple, as usual, is still silent and hasn’t let out any details yet.

But developers and tech experts have generated a lot of cacophony on the Web with expected features in iPhone 5, based on the details embedded in beta-versions of the new operating system, iOS 5, and developments expected on the next iPhone.

Here is a list of rumored features which could propel iPhone 5 to the zenith, but they seem improbable.

4G:

4G offers higher download and upload speed compared to the 3G applications, like mobile broadband access, video chat, Multimedia Messaging Service, mobile TV. 4G allows roaming wireless local area networks, high data rates with 100 Mbit/s wireless service. The increased bandwidth and higher data transmission rates also gives the ability to utilize high definition video and the video conferencing features of mobile devices attached to a 4G network.

iPhone 5 will not support 4G, as the LTE chip price will not match the cost-effective strategies of Apple and the chip will also make it difficult for Apple to maintain the slimness of the iPhone.

New CEO Tim Cook said in an earnings conference call, First-generation of LTE chipsets force a lot of design compromises.

Flash support:

The iPhone 5 was initially rumored tof come with a 12 megapixel camera with a dual-LED flash. Later the reports confirmed that iPhone 5 will come with 8 megapixel camera with new lenses provided by two Taiwanese companies, Largan Precision and Genius Electronic Optical.
Apple’s iPhone 5 will not have a Flash support, as Apple stepped up against Adobe Flash, calling it an unreliable power hog, prone to crashing and messy with resources. Apple has reduced orders for iPhone 4’s current LED flash. Flash developer Morgan Adams says Flash dosen’t work well on mobile touchscreen platforms.

“It’s not because of slow mobile performance, battery drain or crashes. It’s because of the hover or mouseover problem. Many (if not most) current Flash games, menus, and even video players require a visible mouse pointer. They are coded to rely on the difference between hovering over something (mouseover) vs. actually clicking. This distinction is not rare. It’s pervasive, fundamental to interactive design, and vital to the basic use of Flash content. New Flash content designed just for touchscreens can be done, but people want existing Flash sites to work. All of them — not just some here and there — and in a usable manner. That’s impossible no matter what.”

Loudspeaker:

One thing that Apple will certainly aim for is a thinner and sleeker phone, and one thing that would not match its aim is loudspeakers. Speakers, the bigger they are, the better. The speakerphone on the iPhone 4 is one of the weakest, worst performers of any self-respecting smartphone.

Thunderbolt Port:

The iPad 3 is expected to come with a Thunderbolt port, which makes the data flow and connectivity lightning fast. The iPhone 5 will not support a Thunderbolt Port, reducing the possibility of a fast data transfer between the smartphone and iOS devices.

Better Keyboard:

The keyboard isn’t the best, though it gets the job done. The Blackberry Storm series of phones from RIM is a much better option. In vertical mode, RIM deployed an ingenious reduced-set keyboard that was only five keys across and four keys tall. This mixed with smart software, made typing a breeze, even with one hand. It is unlikely that Apple will adopt to a new keyboard.