How to find your Instagram username on Android phone device
Open Instagram App on your Android phone device.
Tap your profile photo in the lower-right corner of the bottom menu bar.
On your profile page, take note of your Instagram username located at the top of the page.
Type in your Instagram username to QRSocial App for Android and tap Save.
Your profile link and your QR Code is private, when you share it with others, they can view or add your profile.