This process will erase everything on your iPhone or iPad, however. If you're using a beta, or preview, release of iOS on your phone or tablet, downgrading is easy.

It's easier to downgrade to the current stable version if you're trying out a beta version of iOS.

When a new stable version of iOS comes out, it's usually only possible to downgrade back to the old version for a few days, although there's a trick you can use. This is especially true if you're trying out a beta version of iOS on your iPhone or iPad. But you may want to go back to an older operating system.