Factory reset iPhone

If you can do this before returning your company phone, we would appreciate it!

1. Tap Settings

2. Scroll down to the General menu and tap it.

3. Scroll all the way to the bottom and tap Reset.

4. On this screen, you'll be presented with a number of reset options. There's nothing specifically labeled "factory reset." The option you want is Erase All Content and Settings. Tap that.

5. If you have a passcode set on your phone, you'll be prompted to enter it here. If you don't have one (even though you should!), skip to the next step.

6. A warning pops up to make sure you understand that if you proceed you'll be erasing all music, other media, data, and settings. Tap Erase to continue.

7. It generally takes a minute or two to delete everything from the iPhone. When the process is done, your iPhone will restart.

Edited from: https://www.lifewire.com/how-to-restore-iphone-to-factory-settings-2000277