Apple may not be releasing figures about its iPhone 7 sales, but that hasn't stopped carriers T-Mobile and Sprint from announcing the iPhone 7 and iPhone 7 Plus phones have broken their own records.

T-Mobile said that the opening day of presales for the iPhone 7 on September 9 set a single-day sales record for any smartphone in the US company's history. It also said the phones broke records for preregistration, beating both the iPhone 6S and the iPhone 6.

Meanwhile Sprint said the first three days of preorders of the iPhone 7 and iPhone 7 Plus are "up more than 375 percent in the first three days over last year" in orders for the previous iPhone.

"iPhone 7 is the biggest preorder in T-Mobile's history, and that says a lot about our momentum and the excitement customers have for iPhone 7 and iPhone 7 Plus!" said John Legere, T-Mobile president and CEO, in a press release.

The iPhone 7 and iPhone 7 Plus will be available Friday.