Your iPhone has a critical security problem that has to be resolved immediately.

Have you lately changed your iPhone’s passcode? Yes, you should invalidate your previous passcode to prevent it from being used to open your iPhone.

That’s correct, due to iOS 17, you can now use prior passcodes to reset your current passcode and unlock your iPhone. This function is known as Temporary Passcode Reset, and it is intended to keep you from being completely locked out of your smartphone if you forget a new passcode after recently changing it.

However, while this might be a very handy function, if you had to reset your iPhone passcode because your previous one had been hacked, and there’s a risk that whomever knows the old one has access to your device, this feature can be used to get into your phone. The intruder might then change your passcode to whatever they want and completely shut you out.

Passcodes are kept for 72 hours after you change, which is plenty of time for nefarious activity. Thankfully, there’s a super quick and easy way to expire your old passcode and shore up your device security. This is how.

1. Go to Settings > Face/Touch ID & Passcode

2. Enter your current passcode

3. Tap Expire Previous Passcode Now

Scroll down to the Temporary Passcode Reset section and tap Expire Previous Passcode Now.

4. Tap Expire Now

Simple and effective, and your device is now secure once more. If you want to read more iPhone lessons, we can teach you how to transfer data from iPhone to iPhone so you can effortlessly transition to a new device.

Would you like to utilise your iPhone as a smart home display? We can demonstrate how to enable StandBy Mode on your iPhone. If your iPhone is running slowly, you’ll want to know how to clear RAM on iPhone.