Backing broken iPhone through iPad?

If your iPhone was accidentally dropped into water while you were fishing, and the display has started flashing yellow or has become completely unusable, you may find yourself unable to enter the passcode or interact with the device.

In that situation, there is an important limitation: you generally cannot create a new backup of the iPhone to a Mac or PC while the device remains locked and cannot be trusted.

For a computer backup to begin, the iPhone normally needs to be unlocked with its passcode. If the computer has not previously been trusted, you may also need to respond to the “Trust This Computer” prompt on the iPhone. If the water damage has made the display unusable, you cannot complete those steps, and the Mac or PC cannot simply bypass the iPhone's security to access its contents.

What about using an iPad?

There is no workaround involving an iPad that allows you to connect a locked iPhone and create a complete backup of it.

An iPad cannot be used as a substitute for a Mac or PC to make a fresh local backup of a locked iPhone. Just like a computer, it cannot access and copy the contents of an iPhone that cannot be unlocked and, where required, trusted.

An iPad may nevertheless contain some of the same information as your iPhone if that information was already being synchronized through your Apple Account and iCloud—for example, contacts, notes, photos, messages and other iCloud-synchronized content. But iCloud synchronization is not the same thing as an iPhone backup, and an iPad does not create a complete backup of another iPhone simply by being signed into the same Apple Account.

The most important question: Was iCloud Backup enabled?

If iCloud Backup was enabled and the iPhone had successfully completed a backup before the water accident, that is your best protection.

The existing iCloud backup is stored separately from the damaged iPhone. The fact that the iPhone's screen is now unusable does not make an already completed iCloud backup disappear.

You can also check iCloud-synchronized information from another Apple device, such as an iPad, if those services were enabled. Remember, however, that some information may be synchronized with iCloud rather than included in an iCloud Backup.

What should you do now?

Do not immediately erase or restore the damaged iPhone. First, have the device professionally inspected and repaired. If the phone can be made functional enough to unlock it, you may then be able to create a fresh backup to iCloud or a trusted Mac/PC.

If the iPhone ultimately has to be erased or replaced, you can set up the repaired or replacement iPhone using your Apple Account and choose Restore from iCloud Backup. Select the most recent usable backup and allow the restoration process to complete. Data that is synchronized separately through iCloud will also download or synchronize again as appropriate.

So, a damaged or unusable screen does not automatically mean that your data is lost. If you had a recent, successfully completed iCloud Backup before the accident, your backed-up data is safely stored in iCloud.

The important distinction is:

Mac/PC backup: Requires the iPhone to be accessible and, where necessary, unlocked and trusted.

iCloud Backup: Can protect the device's data without requiring the damaged iPhone to be physically connected to a computer at the time you need to restore it.

iCloud synchronization: Keeps particular categories of data synchronized across your Apple devices, but it is not the same as having a complete iPhone backup.

Therefore, the safest course is simple: don't erase the water-damaged iPhone prematurely. Get it repaired, determine whether it can be unlocked, and check the date of your latest iCloud Backup. If a valid backup exists, you have a recovery path.

And this is precisely why keeping iCloud Backup enabled and allowing it to complete regularly is so important. A backup made before an accident is infinitely more useful than trying to create one after the screen has decided to become modern art.

Place the iPhone in a dry environment with continuous dry airflow, no rice, no charging, no external connections, and allow the iPhone to dry unbothered for a week or so, and only then power on and see if it starts working again enough to get a backup.

Unfortunately without a miracle, it's too late for the iPhone. It must be working correctly in order to back up.

Working correctly, an iPhone can back up to iCloud, a Mac or a PC. It cannot back up to an iPad.

Sorry, but no.