Make sure the printer supports AirPrint or has a compatible printing app
Connect the iPhone and printer to the same Wi-Fi network
Open the document, photo, email, or webpage you want to print
Tap the Share icon or the More icon
Tap Print
Select your printer
Choose the number of copies and other print options
Tap Print
If using a printer app, install the app from the App Store and follow its setup steps
If using a USB or wired connection, use a compatible adapter and printer support if available