The new colourful Apple iPhone 5C will be available to pre-order from the online Apple Store on the 13th of September 2013, for delivery from the 20th of September 2013. Apple retail stores will be looking to have stock of the new plastic iPhone 5C ready to pickup from the 20th of September 2013. Due to the large numbers of people looking to buy the phone on launch day from brick and mortar stores, pre-ordering online should ensure early delivery.
Source : Apple