Turn off “Allow access to Siri when locked with a passcode”.You should note that this feature could be a security breach to your iPhone, so if this option works for you, you should then go ahead and block the feature on your iPhone by following the steps below. If this option is enabled, you will be able to access different functions on your iPhone without entering your passcode. On most iPhone, you will find the option “Allow access to Siri when locked with a passcode”. This used to be a security glitch and you can give it a try. Unlock iPhone without Passcode Using Siri You will be able to continue to use your iPhone without a passcode. Set up your iPhone afresh and restore your last backup from iCloud.Your iPhone will be erased alongside the passcode you forgot. Choose your iPhone from the devices list.Click on “Find My iPhone” and “All Devices”. You also must have synced your iPhone before. If “Find My iPhone” is enabled on your iPhone, you can reset your forgotten iPhone passcode via iCloud. Then, you will be able to create a new passcode and access it with the new passcode. Once you do this, all the data on your iPhone will be erased, and your backup files will replace them instead. You will get a prompt to set up your iPhone by the iOS Setup Assistant.Connect your iPhone or iPad to your PC or MacBook that you have synchronized the device to in the past.To reset your iPhone passcode using iTunes, follow the steps below. You must have synchronized your iPhone to a computer in the past.Using the iTunes account is another way to unlock your iPhone, and you have to make sure two conditions are met.

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