Setting up your new iPhone with your content and data is not dependent on your choice of carrier.
Follow the instructions in the Quick Start page linked at the head of this page. You will find this is the first step - after turning on your device - in Apple's instructions Set up your iPhone or iPad - Apple Support.
Yesterday I set up an iPad for a family member. This is being used away from home instead of the other option - a MacBook Pro. I used Quick Start to transfer all the settings and all the iCloud content such as iCloud Photos, contacts, calendars and so on. For this device I went no further because very few apps were wanted. I manually sought only a selection of apps from the App Store account, but as you can see in the set up support document you can proceed from the Quick Start stage to then load all your apps and data from a backup. Apple calls this a restore.