Apple Invite Hints At Coloured Handset Apple is expected to launch its latest iPhone within days, after invites to an event at its American HQ were sent out. It is believed the technology giant will unveil the iPhone 5S at an event in Cupertino, California on September 10. The emailed invitation had a picture of the Apple logo surrounded by multi-coloured polka dots and the sentence: "This should brighten everyone's day." The invite fuelled speculation that the latest generation of the smartphone would come in colours others than the trademark black and white. The 5S will feature a fingerprint sensor for enhanced security along with a 12 or 13-megapixel camera, according to reports. But there is also speculation that a second, cheaper version of the iPhone will be unveiled this year called the iPhone 5C, and it could be this device that is available in a range of colours. The current iPhone model comes in just black and white Analysts say the company needs a cheaper phone to encourage growth in markets like China and India, and to counter Samsung's wide range of devices at varying prices. Apple previously announced it is introducing a new operating system - iOS7 - described by chief executive Tim Cook as "the biggest change to iOS since the introduction of the iPhone." The new software has been designed to make the iPhone appear bigger, with features crafted to take advantage of the entire screen. Text is said to appear sharper, while a "control centre" on the phone allows users to adjust settings with just one swipe from the bottom of the screen. This gives instant access to functions such as airplane mode, wi-fi, Bluetooth or Do Not Disturb, and enables users to quickly pause or play a song, jump to the next track and stream music. A "notification centre" will now be available from the "lock" screen so users can view updates with a simple swipe.