When I got my phone I signed in with the wrong apple id. How do I change my Apple Id on my phone?

Where was it signed in? App store? iCloud?

-Ethan

Have you just purchased the iphone second hand ?

Reset your phone in Settings>General>Reset>Erase all content and settings.

RedstoneHUD wrote:

Reset your phone in Settings>General>Reset>Erase all content and settings.

That's not necessary. The OP hasn't explained the full problem. It could be solved an a much simpler way.

And that won't work if the user is signed into iCloud.