I’ve recently started fixing my friends phones and I’m still not 100% confident with my ability. My friend is looking his iPhone 11 back glass replaced. Is there anything inside the phone I need to remove before replacing the back glass or will I be fine with just the battery or even nothing at all. I only have B-7000 glue at the minute so if I were to take the battery out i wudnt have pull tabs but I’ve still got one for the screen.