iPhone 6 pre-order day: How to buy the new smartphones

Device will ship in two sizes on 19 September

The 'dramatically slimmer' iPhone can now be pre-ordered and pre-registered (Apple)

Pre-orders for the iPhone 6 and iPhone 6 Plus begin today, with thousands set to flock to the Apple online and physical stores ahead of the devices' 19 September release date.

As is standard procedure ahead of a product launch, the store displayed a 'We'll be back' message as it prepared for an influx of pre-orders, which it began taking from midnight pacific time (8am UK time) here.

Mobile network operators EE, Three, Vodafone, O2 and more have started offering pre-orders on monthly price plans this morning too, in some cases crashing their sites.

The two new phones, one standing 4.7 inches tall and the other 5.5, will be available in the UK, US, Australia, Canada, France, Germany, Hong Kong, Japan and Puerto Rico initially, with other countries set to follow soon after.

Here's a quick breakdown of the prices:

iPhone 6 (available in gold, silver and space grey)

16GB - £539 (£449.17 ex VAT)

64GB - £619 (£515.83 ex VAT)

128GB - £699 (£582.50 ex VAT)

iPhone 6 Plus (available in same colours)

16GB - £619 (£515.83 ex VAT)

64GB - £699 (£582.50 ex VAT)

128GB - £789 (£657.50 ex VAT)

The iPhone's latest iteration will be slimmer, faster, have longer battery life, an improved camera and make use of NFC technology for payment, with Apple Pay arriving as part of an iOS 8 update this October.