Apple's new iPhone 6 and 6 Plus went up for pre-order just three days ago, and as expected, they've helped set a new sales record. The company announced today that combined sales of the new 4.7-inch and 5.5-inch iPhones topped 4 million in the first 24 hours. While the company hasn't broken down sales by individual models, giving us an early insight into which form factor consumers prefer, it says that initial supply of both units are scarce, which shows people want what the bigger iPhones are capable of offering. To put that into context, Apple saw more than 2 million orders for the iPhone 5 over the same period, but the company didn't share first-day for the combined launch of the iPhone 5s and 5c, which went on to sell more than 9 million units in three days. Given that Apple is pretty much the only phone maker that indulges in obligatory back-patting during every launch window, we're unable to draw much of a comparison against its rivals. However, if you were waiting to grab a new iPhone when they go on general sale this Friday, expect to get in line super early.