How to back up a iPhone with a broken screen it still rings and alarm still gos offf

Hi MG13HA,

You won't be able to initiate a backup without your device functioning. Backups need to be done before your device is damaged.

If your iPhone was already set to backup to iCloud, iCloud backups are performed when your iPhone is locked, on Wi-Fi, and on the charger:

How to back up your iPhone or iPad with iCloud

You can use another device to check for backups:

Locate backups of your iPhone, iPad, and iPod touch

Thanks for using the Apple Support Communities.

Unfortunately, backups have to occur.....before....disasters occur.

Sorry, no way to back up now if the phone is not operating.