Apple's much anticipated iPhone 6s will be released sometime on September 18 or 25.  The expected release coincides with the tech giant's long tradition of introducing iPhones during fall, but why September 18 or 25? Experts have their say on it.  

On a report by Gotta Be Mobile, the website pointed out that aside from the fact that it goes with the expected fall launch, which Apple has been doing for the past 4 years, 18 and 25 both falls on a Friday.

Like the fall launch, Friday is also the day Apple has been using since time immemorial. However, the website is quick to say that the projected days are just speculations since Apple has not confirmed the exact day of the release.

In addition, service provider T-Mobile recently announced that they will be having a promotion in line with the iPhone 6s upcoming release. The US based carrier has announced that they will be allowing their customers to swap their iPhone 6 to the upcoming iPhone 6s free of charge, Business Insider previously reported.

The exchange program was confirmed by a blog post by Business Insider which basically says that the upgrade should be placed within 48 hours (upon availability), and if qualified, along with the other qualifiers, the provider will ship the unit right away.

In related news, the upcoming Apple flagship phablet iPhone 6s will run on Apple's upcoming baby iOS 9, which will also be the operating system for the upcoming iPad and iPod Touches, TeleGraph published.

The iOS 9 operating system will bring a lot of exciting updates and features which include a more proactive Siri, which will have the ability to recognize the user's behavior. The iOS 9 is also expected to fix iPhone's long and lingering battery life issues and bring new experience with the existing Maps and notes.

Nonetheless, regardless of the exact day of the iPhone 6s' release, be it 18^th or 25^th, it is expected for Apple to once again dominate the market with the promise, recent success of the iPhone 6 and 6 Plus new offerings as well as customer experience on the upcoming device.