I am selling my old iPhone 6 Plus. It is not in service, no SIM card. My new iPhone 11 Pro is in service now for quite some time. I cannot sign out of iCloud on the 6 plus. When I go to my name under settings and hit iCloud there is nothing at the bottom of the screen that says sign out. I was able to successfully sign out of iTunes. After I get signed out of iCloud what else do I have to do to make sure none of my info is on old phone? Thanks!