The quickest way to change your iPhone 16 passcode

Open Settings, tap Face ID & Passcode (or Touch ID & Passcode on older models), enter your current passcode, then tap Change Passcode. You'll enter your current code again, then create a new one. The whole process takes about two minutes.

Your passcode is the numeric or alphanumeric code that unlocks your phone. Changing it regularly, or whenever you think someone may have seen it, keeps your device find. iPhone 16 lets you use a 4-digit code, 6-digit code, or a longer custom passcode with letters and numbers.

If you've forgotten your current passcode, you cannot change it directly—you'll need to erase the phone and set it up again using your Apple ID. That's covered in a section below.

Key Takeaways

  • Go to Settings > Face ID & Passcode, enter your current passcode, and select Change Passcode to create a new one.
  • You can choose between a 4-digit code, 6-digit code, or a custom passcode with letters and numbers.
  • If you forget your passcode, you must erase the phone and restore it using your Apple ID—there is no way to recover a forgotten code.
  • After you change your passcode, your phone will ask you to enter it again to confirm it works before saving the change.

Step-by-step: changing your passcode in Settings

Start by opening the Settings app on your home screen. Scroll down and tap Face ID & Passcode. (If your iPhone 16 uses Touch ID instead, the option will say Touch ID & Passcode.)

When prompted, enter your current passcode. This confirms you have permission to change the security settings. Once you enter it correctly, the Face ID & Passcode menu opens.

Tap Change Passcode near the top of the screen. You'll be asked to enter your current passcode one more time. Type it in and tap Next. Now you're ready to create your new code.

Enter your new passcode twice—once in the first field, then again in the second field to confirm. If the two entries don't match, the phone will tell you and ask you to try again. Once they match, tap Done. Your new passcode is now active.

Choosing between 4-digit, 6-digit, and custom passcodes

When you tap Change Passcode, you'll see an option that says Passcode Options. Tap it to choose the type of code you want. A 4-digit passcode is the shortest and fastest to enter, but also the easiest to guess. A 6-digit passcode offers more security with only a small increase in entry time.

Custom Alphanumeric Code lets you use letters, numbers, and symbols, making it much harder to crack. If you choose this option, your passcode might look like iPhone16Blue!. The tradeoff is that it takes longer to type each time you unlock your phone.

Most people use 6-digit codes as a balance between security and convenience. If your phone stores sensitive work information or financial data, a custom alphanumeric code is worth the extra typing time.

What to do if you forget your current passcode

If you've entered the wrong passcode too many times, your iPhone 16 will lock you out temporarily. After the first few wrong attempts, the phone adds a delay. After many wrong attempts, it may disable itself for several minutes or longer.

If you've truly forgotten your passcode and cannot unlock the phone, you cannot change it—you must erase the device. Connect your iPhone to a computer with a USB cable, open Finder (on Mac) or iTunes (on Windows), and select your phone. Choose Restore to erase it and set it up again from scratch.

During setup, you'll be asked to sign in with your Apple ID. Once you do, you can create a brand new passcode. This process erases all data on the phone unless you restore from a backup, so it's worth keeping regular backups in iCloud or on your computer.

Using Face ID or Touch ID alongside your passcode

Your passcode works together with Face ID (or Touch ID on some iPhone models). Face ID lets you unlock your phone by looking at it, but your passcode is the backup method if Face ID doesn't recognize you or if the phone needs extra security.

You can use Face ID and still change your passcode whenever you want—the two are separate. Your passcode is also required to change Face ID settings, make large purchases, or unlock your phone if Face ID fails. Keeping your passcode strong and private is just as important as keeping Face ID working.

If you want to disable Face ID but keep a passcode, go to Settings > Face ID & Passcode and toggle Face ID off. Your passcode will remain your only unlock method.

Why you might want to change your passcode regularly

Change your passcode if you think someone saw you enter it, if you've shared your phone with someone and want a fresh code, or straightforward as part of regular security maintenance. There's no rule about how often to change it, but doing it every few months is a reasonable practice.

If you use the same passcode across multiple devices, changing it on your iPhone 16 won't affect your other phones or accounts—each device has its own passcode. Your Apple ID password is separate from your iPhone passcode, so changing one does not change the other.

Frequently Asked Questions

Can I use a passcode with just letters, no numbers?

No. iPhone passcodes must contain at least one number. You can use letters and numbers together in a custom alphanumeric code, but a code with only letters is not allowed.

What happens if I change my passcode and then forget the new one?

You'll need to erase your iPhone and set it up again using your Apple ID. There is no way to recover or reset a forgotten passcode without erasing the device. Write down your new passcode or store it in a password manager if you're worried about forgetting it.

Does changing my iPhone passcode affect my Apple ID password?

No. Your iPhone passcode and your Apple ID password are completely separate. Changing one does not change the other. Your Apple ID password is what you use to sign into iCloud, the App Store, and other Apple services.

Can I change my passcode without entering the old one first?

No. You must enter your current passcode before you can change it. This is a security feature to prevent someone else from changing your code if they gain temporary access to your phone.

If I restore my iPhone from a backup, will my old passcode come back?

No. Your passcode is not stored in a backup. When you restore from a backup, you keep the new passcode you created during setup. The backup restores your apps, photos, and data, but not your security settings.