The current focus of iPhone 5 rumors surround the phone's release date and anticipated new design, but few people are talking about the iPhone 4S's favorite feature: Siri.

Tech analysts from the iOS 6 News Blog predict that the new iOS 6 operating system, which is expected to be released ahead of the iPhone 5, will bring with it an even more sophisticated voice recognition system.

An upgrade to Siri could possibly mean a better developed interface. Rumors suggest the feature will be activatted by simply shaking the phone and website search, navigation and social media sharing will all be possible through a simple voice command.

When Apple launched Siri with the iPhone 4S last October, the voice recognition system was touted for its understanding of connotation ad meaning, making it a far more intelligent entity than simple voice recognition. The feature is expected to be developed further in the coming year in an aim to rival conventional search engines like Google, with an intelligent voice assistant alternative.

Apple's iOS 6 software is expected at the Worldwide Developers Conference, where the iOS 5 software was revealed last year.

Other rumors surrounding the new iPhone

Release Date:The two most popular release date rumors for the iPhone 5 are June and October.

Display: The latest iPhone 5 rumors point to a 1280 x70 resolution with a Quantum Dot LED curved glass edge-to-edge display. Since the launch of the new iPad, Apple enthusiasts are convinced the phone will come with a retina display. A bigger 4-inch or 4.6-inch screen is also expected after many iPhone customers have criticized the iPhone screen for being too small.

Processor: The iPhone 5 will probably come with an A6 Chip, after the iPad was released with the A5X quad-core processor touted as twice as fast and four times better performing than the Tegra 3 chip. An A6 chip would double the power of the A5 chip that is currently used in the iPhone 4s and the iPad 2. An unnamed source, who claims to have an iPad 3 prototype, sent Boy Genius Report pictures of a diagnostic tool called iBoot, which states a chip model number that appears to be that of the A6 chip.

iOS 6 Software:Ars Technica has published some analysis that suggests some Apple products are already running on iOS 6 software. The analysis would suggest that Apple is either doing a test run on some of its new products. We might expect the new software at the Worldwide Developers Conference, where the iOS 5 software was revealed last year.

Better Battery

The iPhone 4s's battery life is one of its most criticized features. Apple tried to fix the bug with an iOS 5.0.1 update, and while some users said it had improved their battery life, other complained that the performance wasn't good enough. It is therefore likely that Apple are focusing on overall higher battery life and performance, which is paramount if it keeps introducing battery draining features like Siri.