The iPhone 7 uses a single card design and does not support dual cards and memory card expansion, which means only one SIM card can be used, Nano SIM card.
Why is the Apple mobile phone charging cable easily damaged?
Does the iPhone automatically power off when it is charged to 100?
How to clean the phone's screen?
How do I download iPhone photos to a Mac
How to Download iPhone Photos to PC
How to Find My New Phone Number on iPhone
How to Activate T-Mobile SIM Card
How to Organize iPhone APPS Alphabetically
How to Organize Your Home Screen on iPhone
How to Delete Photo Albums on iPhone and iPad
How to search for specific emoji on iPhone