The SoftwareDive Team has been exploring the issue of the “Enter Passcode for Other iPhone” prompt on iPhones for some time. After extensive testing and continued investigation, we’ve compiled our findings into a comprehensive article.

Note that the Enter Passcode for Other iPhone Prompts on recent iOS versions. If your iPhone runs on earlier iOS versions during the setup, you won’t see the prompt.

Why You See the Screen Enter Passcode for Other iPhone During Setup

iCloud uses strong security methods to encrypt your data. During the encryption process, Apple uses your old or current device passcode to protect data secured with end-to-end encryption. Not everyone will encounter the same situation—what you may lose if you forget all your passcodes depends on your iPhone’s security settings and configuration.

The data In transit and on server of Apple can be restored, while the data of end-to-end data should be lost when you can’t “Enter the passcode for other iPhone”.

When you encounter the “Enter Passcode for Other iPhone” prompt, there are three possible outcomes for your final data after setting up your iPhone.

The first outcome is that all your data is successfully restored.

When you encounter the “Enter Passcode for Other iPhone” prompt, your iPhone will later ask for the passcode of any device signed in with the same Apple ID. If you can think of any one of the devices’ passcodes, you can regain access to all your data. If you remember the old passcode of the device (the device in hand), you can also retrieve all your data not the end-to-end encrypted data.

All the devices include iPhones, iPads, MacOS computers, iPods etc. If you enter any one of the correct passcodes, you’ll bypass the screen. And finally get back all your data before you unlocking or resetting the iPhone.

If you have many devices, you’re lucky to bypass the page if you enter the passcode.

Step 1. When the screen Enter Passcode for Other iPhone prompts, enter the passcode.

Step 2. Wait for a while and after the setup is complete, all your data should be synced.

The second outcome is that most of your data is successfully restored.

When you forgot all passcodes if the “Enter Passcode for other iPhone” prompts, with Standard Data Protection on.

Most people reset their iPhones for a forgotten passcode, if you forget all the passcodes of all devices, you may also get most of your data back if you’re not a tech savvy.

Standard data protection is the default setting for your account. Many people should have the default settings if they leave it default. In this scenario, they can get the data in transit and on server. They should lose the end-to-end encrypted data.

The prerequisites of the Second outcome: You have the Advanced Data Protection off.

The path of the option Advanced Data Protection:

Settings > Apple ID > iCloud > Advanced Data Protection. If it’s off, you can get back all the data stored in transit and on server, but lose the end-to-end data.

The data you will get and lost is listed below with Standard Data Protection on.

The data should be restored.

The data should be lost.

The third outcome is most of your data is lost when you forgot all passcodes.

When you forgot all passcodes if the “Enter Passcode for other iPhone” prompts, with Advanced Data Protection on.

If you toggle the switch on of the Advanced Data Protection, you will get most of your data lost.

Where shall we turn on the Advanced Data Protection?

Steps to turn on the Advanced Data Protection:

Tap Settings.

Tap Your Name of Apple ID.

Tap iCloud.

Toggle the switch to on beside the Advanced Data Protection Option.

Data types you can successfully restored on your iPhone when “Enter Passcode for other iPhone” prompts, with Advanced Data Protection on, forgetting all passcodes.

iCloud email, Contacts, Calendar. Only these three types of data is not the end-to-end data, so that you can recover it.

Data types you should lost on your iPhone when “Enter Passcode for other iPhone” prompts, with Advanced Data Protection on, forgetting all passcodes.

iCloud Backup (including device and Messages backup), iCloud Drive, Photos, Notes, Reminders, Safari Bookmarks, Siri Shortcuts, Voice Memos, Wallet passes, Freeform, Apple Invites, Passwords and Keychain, Health data, Journal data, Home data, Messages in iCloud, Payment information, Apple Card transactions, Maps, QuickType Keyboard learnt vocabulary, Safari, Screen Time, Siri information, Wi-Fi passwords, W1 and H1 Bluetooth keys, Memoji.

All of the latter data type is end-to-end encrypted data, which will be lost.

The higher security level, the more risks to lose your data when you forget your passcodes on iPhone. While it matters more than ever for security on iPhone in the era. Remembering your passcode or storing the passcodes to a safe place is significant for us.

If you lost your data on your iPhone, we recommend you to recover your data with the iPhone Data Recovery software. With the app, you can restore your data from the iCloud backups visually and selectively. If you delete your data on the iPhone inadvertently, you can also recover the data on your iPhone.

If your iPhone got security lockout, you can refer to SD iPhone Unlocker.

About Apple’s iCloud Data Security, You can refer to https://support.apple.com/en-us/102651.

More questions about the Enter Passcode for other iPhone prompt, you can leave a comment.

Video Tutorial:

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