The iPhone 13 is set to be unveiled next month at Apple’s annual September launch event and the latest rumours suggest that the biggest upgrade will be a new high refresh rate display.

Twelve months on from the arrival of the iPhone 12, Apple is now putting the finishing touches to four new smartphone models, each of which are expected to be available next month “without delays”.

An evolution on the current tech, the iPhone 13 is tipped to include faster processors, reworked camera systems and 120Hz displays, alongside last year’s breakthrough with 5G support.

However, the biggest upgrades may be limited to the more expensive iPhone 13 Pro and iPhone 13 Pro Max models.

The latest leaks suggest that this is true for the new high refresh rate display, the first ever in an iPhone, with the standard iPhone 13 and iPhone 13 Mini housing a slower 60Hz screen.

There are changes anticipated to all four models, including a smaller notch following a reduction in size of the Face ID sensor.

Early rumours claimed that Apple might bring back Touch ID with an in-screen fingerprint sensor, but this hasn’t made the cut, so customers will have to make do with a “30% slimmer” notch.

Other upgrades include larger batteries for every model, better cameras with the biggest upgrades reserved for the Pro models, and a new and more powerful A15 processor.

Apple might also add two new colour schemes when it unveils the iPhone 13 at an official event that insiders believe will take place on 14th September.

The iPhone 13 is then expected to go on sale in the UK a few days later starting from £699.