How to Change Your iPhone Passcode (And What You Should Know First)

Your iPhone passcode is the first line of defense between your personal data and anyone who picks up your phone. Changing it is straightforward — but the right passcode type and settings depend on factors specific to your situation. Here's what you need to understand before and during the process.

What "iPhone Code" Actually Means

When most people say "iPhone code," they mean the passcode — the PIN or password you enter to unlock your device. This is separate from your Apple ID password, though the two are often confused.

Your passcode does more than unlock the screen. It:

• Encrypts the data stored on your device
• Is required when Face ID or Touch ID fails
• Gates access to sensitive settings, Apple Pay, and Screen Time
• Protects your device if it's lost or stolen

iOS supports several passcode types, and the one you're using matters.

The Passcode Types Available on iPhone

Most iPhones default to a 6-digit numeric code since iOS 9. If your phone still uses a 4-digit code, it was likely set up on an older version of iOS and never updated.

How to Change Your iPhone Passcode

The process is the same whether you're switching from one numeric code to another or upgrading to an alphanumeric password.

Step-by-Step: Changing Your Passcode

1. Open the Settings app
2. Scroll down and tap Face ID & Passcode (or Touch ID & Passcode on older models)
3. Enter your current passcode when prompted
4. Scroll down and tap Change Passcode
5. Enter your current passcode again
6. Enter your new passcode
7. Confirm by entering it a second time

That's the core process. Where people get tripped up is in step 6 — iOS will default to the same passcode type you were already using. If you want to switch types, look for the Passcode Options link that appears above the keypad.

Switching to a Different Passcode Type

Tapping Passcode Options during setup gives you the full menu:

• Custom Alphanumeric Code — letters, numbers, symbols; most secure
• Custom Numeric Code — any length you choose
• 4-Digit Numeric Code — short and fast; weakest option

🔒 If you're upgrading from a 4-digit to a 6-digit or longer code, this is the moment to make that switch.

What Happens to Face ID or Touch ID When You Change It

Changing your passcode does not delete your saved biometrics. Face ID and Touch ID remain enrolled and functional after a passcode change. The new passcode simply becomes the fallback when biometrics don't work — such as after a restart, five failed Face ID attempts, or when you haven't unlocked the phone in 48+ hours.

This is worth knowing because many people avoid changing their passcode out of fear it will disrupt biometric login. It won't.

When You Can't Remember Your Current Passcode

If you've forgotten your passcode, you cannot change it through Settings — iOS requires passcode verification before allowing any changes. Your options in that case involve putting the device into recovery mode via a computer, which resets the device entirely.

This is intentional. iOS is designed so that nobody — including Apple — can bypass your passcode without erasing the device. It's a core feature of the security model, not a bug.

Variables That Affect Your Decision

The "right" passcode setup isn't universal. A few factors shape what makes sense:

How often you unlock your phone without biometrics. If Face ID or Touch ID works reliably for you 99% of the time, a longer alphanumeric passcode is a reasonable upgrade with minimal day-to-day friction.

Your iOS version. Some passcode behaviors (like USB Restricted Mode or the option to erase after 10 failed attempts) vary by iOS version. The general passcode change process is consistent across recent versions, but security features around it have evolved.

Whether Screen Time is enabled. If Screen Time is active with a separate Screen Time passcode, you may encounter an additional prompt during changes — especially if you're a parent managing a child's device.

Device age and model. Older devices using Touch ID have a slightly different path in Settings than newer Face ID models, though the underlying steps are the same.

Shared or managed devices. On corporate or school-managed iPhones, a Mobile Device Management (MDM) profile may enforce minimum passcode requirements — such as minimum length, required complexity, or mandatory expiration timers. In those cases, your options are constrained by whatever the administrator has configured.

🔐 A Note on Passcode Strength

A 6-digit numeric code has 1,000,000 possible combinations. A 4-digit code has 10,000. An alphanumeric code of even modest length — say, 8 characters mixing letters and numbers — is exponentially harder to brute-force, especially given iOS's built-in delay timers between failed attempts.

That said, a passcode you can reliably remember is always better than a complex one you'll forget or write down somewhere insecure.

What the Process Doesn't Cover

Changing your iPhone passcode has no effect on:

• Your Apple ID password — managed separately at appleid.apple.com
• Your Screen Time passcode — changed through Screen Time settings
• Passwords saved in iCloud Keychain — those are app/site credentials, not your device lock code
• Your carrier PIN — a separate code sometimes used for SIM card protection

Each of these exists in its own layer of iOS security. Understanding which one actually needs changing for your situation is often the more important question than the mechanics of how to change it.