There is a chance that the upcoming iOS 9 will pack big changes as rumors surrounding the alleged iPhone 6S and iPhone 6S Plus reveal that there will be a spike on the devices' specifications. 

Rumors suggest that Apple will release the iPhone 6S and the iPhone 6S Plus instead of the widely purported iPhone 7. According to a report from Forbes, these handsets will each contain 2 GB of LPDDR4-based RAM compared to the 1 GB LPDDR3 RAM housed in the current iPhone 6 and iPhone 6 Plus. This is supported by previous reports claiming that Apple will double the RAM of its mobile devices, along with the pressure from Apple's rivals that constantly increase the RAM of their products. 

Bumping the RAM will increase the performance of the handset and will open the apps quicker and provide improved multitasking abilities. However, a doubled RAM may spike the price of the device by 35 percent.

This particular upgrade on the iPhone points to radical changes to be made in iOS 9. Apple does not usually bump the specs and features of its devices unless it will boast a big change or addition in the device like the iPhone.

Recent reports add fuel to the fire claiming that Apple is currently working on the iOS 9 in order to keep with its timeline and roadmap last year. The operating system will most likely be announced at the Worldwide Developers' Conference 2015 in June. 

Apple has not revealed the details yet since it does not pre-announce its products. The company could be saving the juicy details in its keynote address at the press event. There is a possibility that Apple will open the Apple Pay or NFC chip to developers as it did with the TouchID fingerprint sensor. 

Apple has confirmed none of the aforementioned speculations, but the rumor mill will not stop until Apple spills out the official details.