The reengineered iOS 7 will create an overall new device look for Apple handsets, with the iPhone 5S and the iPhone 6 expected to sport profiles that are "black, white and flat all over," on release date.

Much of the credit, of course, goes to Apple design chief Jony Ive, who reportedly pushed for a full system overhaul not only for the tech giant's smartphone lines but also for all iOS gadgets. In short, the changes will be implemented across the board.

According to Apple-centric tech blog site 9to5Mac, worked furiously to get rid of the old iPhone, iPad and iPod look and its place will be ushered a dominantly black and white theme, affecting iOS gadgets system settings and signature Apple applications.

The iPhone home screen, for example, will shed considerable gloss and shine in favour of a more simplified and flatter look. To go with the changes are new icons for the core Apple apps, a move that supposedly is in harmony with the end-result of the iOS 7 re-creation.

Gone will be the real-world effect on numerous iPhone tools, according to Gotta Be Mobile, leaving the Note app, for instance, with a pure white backdrop instead of the yellow theme that reminds of the real legal paper.

But the more exciting changes are delivered through the revamped lock screen and the notification features.

The latter is now powered by the long-delayed arrival of iOS widgets. This control panel, apart from getting a stripped-down look, will allow iPhone users to easily toggle on and off features of their choice.

And with the birth of Apple Widgets, users will get easy access not only on specific handset settings but also on real-time information such as weather, traffic and navigational information and the latest news updates from around the world.

In the lock screen department, it is believed that Mr Ive has axed the glossy 'slide to unlock bar' and in its stead is a classic black interface. It is likely too that the iPhone's PIN-entry experience is getting its own dose of tweaks.

When keying PINs to gain access on the device, users will see circle buttons accepting the codes instead of the usual squares, 9to5Mac said on its report.

Apple is staging its annual WWDC on June 10 and it's almost a given that the world will get to see at least a demo version of the new iOS 7 prowess and appeal.

Yet the real deal is not expected to arrive until September this year, which analysts said is the appointed release date of the iPhone 5S and its low-cost edition - both to come in various colour options.

By June 2014, it is the iPhone 6's time to shine, rumoured to flex a major hardware upgrade and redesign plus the further iOS 7 enhancements on D-Day.