The Apple iPhone 6 and 6 Plus are extremely popular smartphones - demand has been very tight, and supply constraints have eased only slightly. However, supply still hasn't caught up with such strong demand, with 56 percent of models available in store as of Friday, December 12, according to figures compiled by Piper Jaffray analyst Gene Munster.
Mid-November statistics indicated there was only little supply, and Munster predicts it will be close to the end of the quarter before the numbers reach 80 percent supply.
Apple previously said it didn't have interest in larger-screened iPhones, but reversed its decision after Google Android smartphones began to take over. Each new generation of iPhone tends to do well, but the large screen devices have captured a large amount of attention from Apple enthusiasts.