When I want to sign into the App Store it shows an Apple ID that's not mine
[Edited by Moderator]
iPhone 6s, iOS 15
[Edited by Moderator]
iPhone 6s, iOS 15
Go to Settings > [name on top] > Media & Purchases. Is this your Apple ID? Also verify the name of the Apple ID on the top of the page.
Did you buy this phone used?
When I want to sign into the App Store it shows an Apple ID that's not mine