There are no rumors suggesting supplies of the new devices are going to be constrained, but it's always a good idea to pre-order early if you're aiming for a launch day device. It's a good idea to have a backup plan if Apple happens to sell out of a particular device that you're aiming for.
Below, we've rounded up the carriers and retailers in the United States that we've confirmed are offering pre-orders for the new Apple Watch and iPhone models.
T-Mobile will begin accepting pre-orders for the iPhone XS and iPhone XS Max at 12:01 a.m. Pacific Time on September 14.
Customers can elect to sign up for a reminder email on the T-Mobile website, and those with the T-Mobile app will receive a push notification when pre-orders go live.
T-Mobile's Equipment Installment Plan will require a $279.99 down payment for the 64GB iPhone XS, with monthly payments at $30. Higher down payments of $429 and $629 are required for the 256 and 512GB models.
For the iPhone XS Max, T-Mobile will require customers to pay $379.99 up front, with monthly payments at $30 per month. A downpayment of $529 is required for the 256GB iPhone XS Max, while a $729 downpayment is required for the 512GB iPhone XS Max.
T-Mobile customers can get an aluminum Apple Watch Series 4 model for $0 down with monthly payments of $20.83 for the 40mm version and $22.08 for the 44mm version. Stainless steel models will require a downpayment of $171.99 (40mm) or $221.99 (44mm) with a monthly payment of $22.
T-Mobile says that its "super well-qualified customers" can pre-order iPhone XS and iPhone XS Max models for $0 down, with the chart above pertaining to "well-qualified customers," so pricing may vary.
Customers who trade in an eligible iPhone can get up to $300 towards the purchase price of a new iPhone.
AT&T will begin accepting pre-orders for the iPhone XS and iPhone XS Max at 12:01 a.m. Pacific Time on September 14. AT&T will also be offering the Apple Watch Series 4 starting on September 14.
AT&T is featuring a countdown to when pre-orders begin on its website, and customers can also sign up to receive an email when pre-orders go live.
Pricing for the iPhone XS starts at $41.63 per month for 24 months using AT&T's Next payment installment program. Pricing for the iPhone XS Max starts at $45.80 per month for 24 months using AT&T Next.
Verizon will begin accepting pre-orders for the iPhone XS, iPhone XS Max, and Apple Watch Series 4 at 12:01 a.m. Pacific Time on September 14.
There is a countdown to pre-orders on the Verizon website, and customers can sign up for email updates.
iPhone XS pricing at Verizon starts at $41.66 per month for 24 months, while iPhone XS Max pricing starts at $45.83 per month for 24 months.
Verizon will be selling the Apple Watch Series 4 for $83.33 per month paid over six months, with the company planning to temporarily waive line charges when a new Apple Watch is activated.
Verizon is offering a promomotion that provides $700 off a second iPhone when purchasing an iPhone X, iPhone 8, iPhone 8+, iPhone Xs and iPhone Xs Max using a Verizon device payment plan and activating a new line of service.
As for trade-ins, Verizon is offering a $100 minimum trade-in with iPhone XS or XS Max purchase.
Sprint will begin accepting pre-orders for the iPhone XS and iPhone XS Max at 12:01 a.m. Pacific Time on September 14.
According to Sprint, Sprint customers can "jump the line" and receive Sprint Priority Status by downloading the MySprint app. Sprint is reserving pre-order spots starting now, allowing customers to save a spot without needing to get up at midnight PT.
Sprint customers are instructed to choose a device and then re-visit the Sprint app by midnight on Saturday, September 15 to place an official order.
Comcast's Xfinity Mobile will be offering iPhone XS and iPhone XS Max pre-orders starting at 12:01 a.m. Pacific Time on September 14.
Best Buy confirmed to MacRumors that it will begin accepting pre-orders for Sprint, Verizon, and AT&T iPhone XS and XS Max models at 12:01 a.m. Pacific Time on September 14.
Apple Watch Series 4 pre-orders will also be available at the same time.
Target will be offering iPhone XS, XS Max, and Apple Watch Series 4 for sale, and while the website does not list a specific availability time, it's likely pre-orders will kick off at 12:01 a.m. Pacific Time.
Target will have Verizon, AT&T, and Sprint models available for purchase.
Like Target, Walmart is listing the iPhone XS and iPhone XS Max as "coming soon," with no specific availability date listed. Apple Watch Series 4 is also listed as "coming soon."
We've asked Walmart for clarification, but it's likely pre-orders will begin at 12:01 a.m. Pacific Time.
B&H Photo is accepting pre-orders for the Apple Watch Series 4 starting at 12:01 a.m. Pacific Time on Friday, September 14. Most customers ordering from B&H Photo will not need to pay taxes as taxes are only applicable in New York or New Jersey.
B&H Photo does not sell iPhones and will not have iPhone XS and iPhone XS Max models available.