If you need to reset your iPhone to factory settings to resolve an issue, you can back it up to iCloud first and then restore it to keep your data.
You can change the iCloud account on your iPad by signing out of your old account and into a new one, or add a different account for app purchases.
To change your iCloud password, you can do it in many different ways. You can change your iCloud password on your computer or ...
Learn how to protect your photos with iCloud security. Prevent theft of photos from your iCloud account with the simple steps ...