It is expected that within few hours when WWDC starts Apple might announce new OS for its mobile devices, iOS 7. Folks over 9to5Mac have a chance to look over beta version of iOS 7 and describe us how it will look like.
There are changes in almost all section of the UI from to color scheme and network bar too. Apple has removed iconic signal bar and introduced new dots like network icon. Icons also got makeover and they got new colors and new look.
There is also new color scheme for some apps, as per report many apps will have color scheme of Black and White, it could possibly means that Black or White iPhone will have there own color scheme or it might happen that colors will change as per time of the day.
Another change is in keyborad colors in “Black mode”, the keyboard is black with gray letters and in “white mode”, gray keys with white letters something like Android.