The iPhone 6 release date will come soon, and the latest beta version of iOS 7 hinted some of the killer features that will be included in the device.

The new iOS 7 beta 4 is now available for download since July 29. It will not be that long before the beta 5 will be released.

According to Apple, the official version of iOS 7 will be released in the fall. By vaguely confirming the release date of iOS 7, Apple also hinted the date of announcement of the next iPhone.

Last year, the iPhone 5 was released along with iOS 6. Moreover, the iOS 6 was officially released on September 19, which was exactly 100 days after its announcement.

If Apple will follow its formula from last year, the official version of iOS 7 may be released on September 18. The iOS 7 Beta 3 was released last week. iOS usually releases three to seven beta versions before the official version comes out. This is to ensure that the official iOS is free from bugs and problems.

Rumour has it that Apple's iPhone 6 will be powered by A7 quad core processor, which is claimed to be faster than the previous processor. The processor will be paired with iOS 7 operating system, which is packed with new and better features.

Apple may have planned to bump the storage capacity of its smartphones. The iPhone 6 is said to be coming with 16, 32, 64 and 128 GB internal storage. The company may also add a new security feature to its devices with the inclusion of fingerprint sensor in the home button.

However, the concrete iPhone 6 release date was not confirmed yet by Apple.

Below are the top five killer features that we will most likely see on the iPhone 6 release date.

Better Camera - It is most likely that the new iPhone 6 will include some camera improvements, and some reports have suggested that the new camera could have 12 megapixels with low-light shooting and a HDR setting. Moreover, the new iPhone's camera app will be improved and the look of the camera app will be changed.

Fingerprint Sensor with Home Button - The latest iOS 7 beta version hinted the inclusion of fingerprint sensor as BiometricKitUI code bundle was found in the latest beta version of iOS 7. Moreover, it included strings on how to use a fingerprint sensor on an iPhone.

Better Speakers - Apple's new iPhone 6 will have better speakers because of the introduction of audio-only FaceTime to allow us to hear the voice more clearly.

Better Battery - Some of the new features in iOS 7 are audio-only FaceTime calls over 4G LTE, automatic updates and an inclinometer, which were expected to eat up a lot of battery power. Therefore, Apple may increase the battery capacity of the device.

No NFC - It seemed that Apple still thinks that the iPhone 6 does not need Near Field Communication, which is already available in many Android-based smartphones.