How to factory reset an iPhone SE

You can reset your iPhone by visiting Settings > General > Transfer or Reset iPhone > Erase all content and settings. You can then choose options for what you want to erase.

You can also connect it to a Mac or computer with iTunes.

You would connect to a Mac using the Finder......unless you have a very old Mac.

iTunes would work on old PCs, but on newer PCs, you would download and install Apple Devices from the Microsoft site.

I didn’t say use iTunes on Mac.

“computer with iTunes ” -> computer that supports iTunes

Either way, iTunes still works and is more likely to already be installed.