Open Settings and find the passcode menu

To change your iPhone 16 passcode, start by opening the Settings app — the gray gear icon on your home screen. Scroll down until you see "Face ID & Passcode" (or "Touch ID & Passcode" if you use fingerprint instead of face recognition). Tap it, then enter your current passcode when prompted.

The system asks for your current passcode to confirm you own the phone before letting you change it. This is a security step that prevents someone else from changing your code if they pick up your unlocked phone.

Key Takeaways

  • You must enter your current passcode before you can create a new one, even if you remember it perfectly.
  • iPhone 16 defaults to a six-digit passcode, but you can switch to four digits or a custom alphanumeric code if you prefer.
  • If you forget your current passcode, you cannot change it through Settings — you will need to erase and set up the phone again through a computer or iCloud.
  • Your new passcode takes effect immediately and you will need it the next time you unlock your phone.

Tap "Change Passcode" and enter your new code

Once you are in the Face ID & Passcode menu, look for the button labeled "Change Passcode" near the top of the screen. Tap it. The phone will ask you to enter your current passcode one more time — this is a final confirmation step.

After you enter the current code, a new screen appears asking you to create your new passcode. Type the six-digit number you want to use. The phone will not show the digits as you type them — you will see dots instead for security.

Confirm your new passcode by typing it twice

After you enter your new passcode once, the phone asks you to type it again. This second entry confirms you did not make a typo. If the two entries match, the change is complete. If they do not match, the phone will tell you and ask you to try again.

Take your time typing. A passcode you can remember is more useful than one you have to reset because you forgot it. Many people use a number that has personal meaning but is not obvious from social media — a date, a lucky number, or a combination of both.

Switch to a different passcode length if you want

By default, iPhone 16 uses a six-digit passcode. If you prefer something shorter or longer, you can change this before you create your new code. In the Face ID & Passcode menu, look for "Passcode Options" — it appears just before the "Change Passcode" button.

Tap "Passcode Options" and you will see three choices: a four-digit passcode, a six-digit passcode (the default), or a custom alphanumeric code (letters and numbers mixed together). Select whichever you prefer, then proceed to change your passcode as normal. The length you choose applies only to your new code — it does not affect your old one.

What to do if you forget your current passcode

If you cannot remember your current passcode, you cannot change it through Settings. The phone will not let you proceed without entering the correct code first. Your only option is to erase the phone and set it up again from scratch.

To erase your phone, you will need access to a computer with a web browser or to another Apple device. Go to iCloud.com (or use Find My on another Apple device), sign in with your Apple ID, and use Find My iPhone to erase your device remotely. After the phone erases, you can set it up again and create a new passcode. This process takes 10 to 20 minutes depending on your internet speed.

Your new passcode is active immediately

Once you confirm your new passcode by typing it twice, the change takes effect right away. The next time your screen locks — whether from timeout, pressing the side button, or manually — you will need to use your new code to unlock it. Your old passcode stops working immediately.

If you have other devices signed into the same Apple ID (an iPad, Mac, or Apple Watch), they are not affected. Each device has its own passcode and changing one does not change the others. If you want to use the same code across multiple devices, you will need to change each one separately.

Frequently Asked Questions

Can I use the same passcode I used before?

Yes. The phone will let you enter your old passcode as your new one. However, if someone saw your old code or guessed it, changing to the same number does not improve your security. It is better to choose something different.

What happens if I enter the wrong passcode when confirming?

The phone will tell you the two entries do not match and ask you to try again. You can re-enter your new passcode as many times as you need. There is no limit to how many attempts you get during the change process — the attempt limit only applies when you are trying to unlock your phone.

Do I need to change my passcode regularly?

There is no rule that says you must. Change it if you think someone knows your code, if you used it in front of others, or if you simply want to update it. Many people change their passcode once or twice a year as a routine security habit.

Will changing my passcode affect my Face ID or Touch ID?

No. Your biometric unlock (face or fingerprint) works independently from your passcode. Changing the passcode does not affect Face ID or Touch ID, and you can still use either one to unlock your phone without entering a code.

Can I set a passcode with letters and numbers on iPhone 16?

Yes, but only if you choose the custom alphanumeric option in Passcode Options before you create your new code. The default six-digit and four-digit options use numbers only. Once you select alphanumeric, you can mix letters and numbers in any order.