Unlocking my iphone while it's asking for a passcode?

So when my iphone is locked, I'm able to unlock it by double clicking the home button, how do I fix this?

If you have it enabled you have to enter a passcode before you can use your iPhone…

You would have set this yourself.

If you've forgotten it, login to iCloud and use the "find my iPhone" feature. You can use this to lock your phone, then use that code to unlock your iPhone.
Once you've unlocked it, go back to the setting and either change the pass code, or disable it.

It's in voice over mode.
Read this and use three fingers to get out of it. Best luck.
https://discussions.apple.com/...8#20025558