In preparation, please have ready the e-mail address and password for the Instagram account you’re linking.
Open the Instagram app on your phone’s home screen by tapping on the Instagram icon.
Tap the Profile icon at the bottom of the screen.
In the Profile screen, tap Edit Profile.
On the profile screen, tap the three-line “hamburger” button in the upper right.
On the following screen, tap the Settings button towards the bottom.
In the Settings screen, swipe down and tap Log Out towards the bottom.
Tap the Log Out button to confirm.
Tap the Switch Accounts button in the lower left of the screen.
Log in with the phone number, email, or username and password of the Instagram account you want to link.
Click here to continue linking your Instagram account to a Facebook page.