How to delete apps on iPhone 6s and iPhone 6s Plus
To avoid accidentally triggering Quick Actions because of 3D Touch:
Go to the Home screen.
Gently place your finger lightly on the app icon you want to move or delete, and wait for a few seconds to put it in jiggle mode. Note, you can no longer press firmly on the app icon as it would trigger Quick Actions.
If you’re still triggering Quick Actions then the foolproof method is to find a folder like Extras, and place your finger or press as firmly as you want on the folder, and wait for a few seconds to put the app icons and folders in jiggle mode. Since folders don’t have Quick Actions, it doesn’t matter how firmly you press on them without accidentally triggering Quick Actions.
Once the app icons are in wiggle mode, you will be able to move or delete them from the Home screen.
Alternatively, you can also adjust the sensitivity of 3D Touch based on your preference to make it easier or harder to trigger 3D Touch Quick Actions.