Apple said today it had received a record four million first-day pre-orders of its new iPhone 6 and iPhone 6 Plus, meaning many customers will have to wait until October for their new phones. 

The phones will be available in Ireland from September 26.  

Apple said a significant number of orders will be delivered to customers in the US from Friday, but many will be shipped in October as demand outstrips supply. 

The first-day pre-orders for the new iPhones, which feature larger screens, were double the two million orders for iPhone 5 models in 2012. 

While Apple did not break out first-day pre-orders for its iPhone 5Ss and 5Cs launched last year, it sold nine million of those phones in the first three days in stores as China joined the list of launch countries for the first time. 

The company said the new iPhone models will be available to customers in its stores in the US, Canada, Australia and some other countries on Friday morning. 

AT&T Inc, Sprint, T-Mobile US and Verizon Wireless and some Apple authorised resellers will also start selling the phones on Friday.
            
The company routinely grapples with iPhone supply constraints, particularly in years that involve a smartphone re-design.