The two-unit cap applies globally across all configurations, including markets in Japan, Spain, and the United Kingdom.

Apple is only allowing customers in the United States to purchase a maximum of two iPhone Duos. Attempting to purchase more than two on the website or the Apple Store app gives the following notice: "A maximum of 2 iPhone Duo can be purchased per customer. Please adjust the total quantity of iPhone Duo in your order before checking out". Some Reddit users describe the U.S. purchase limit as new, but we couldn't confirm if it was in place when pre-orders started on October 16.

Apple is only allowing customers in the United States to purchase a maximum of two iPhone Duos. Attempting to purchase more than two on the website or the Apple Store app gives the following notice: "A maximum of 2 iPhone Duo can be purchased per customer. Please adjust the total quantity of iPhone Duo in your order before checking out". Some Reddit users describe the U.S. purchase limit as new, but we couldn't confirm if it was in place when pre-orders started on October 16.

Apple is only allowing customers in the United States to purchase a maximum of two iPhone Duos. Attempting to purchase more than two on the website or the Apple Store app gives the following notice: "A maximum of 2 iPhone Duo can be purchased per customer. Please adjust the total quantity of iPhone Duo in your order before checking out". Some Reddit users describe the U.S. purchase limit as new, but we couldn't confirm if it was in place when pre-orders started on October 16.