To unlock an iPhone without the passcode, the main approaches involve erasing the device to remove the passcode, since bypassing it without data loss is generally not possible. Here are the most reliable methods:

Official Apple Method: Restore via Recovery Mode

1. Turn off the iPhone.
2. Put the iPhone into recovery mode (the method depends on the model).
3. Connect it to a computer with iTunes (Windows or macOS Mojave and earlier) or Finder (macOS Catalina and later).
4. Choose "Restore" when prompted, which erases the device and removes the passcode.
5. After restoring, you can set up the iPhone as new or restore from a backup

Using Find My iPhone (iCloud)

• If "Find My iPhone" is enabled, log in to icloud.com/find on another device.
• Select your iPhone under "All Devices."
• Choose "Erase iPhone" to remotely wipe the device and remove the passcode.
• After erasing, you can restore from an iCloud backup if available

Third-Party Software Tools

• Tools such as Dr.Fone - Screen Unlock (iOS) can unlock iPhones without a passcode by putting the device into recovery mode and removing the lock screen.
• These tools support all iPhone models and iOS versions, and typically erase the device to remove the passcode

Other Methods (Limited or Older iOS Versions)

• For iOS 10.3.2 and 10.3.3, a Siri exploit could unlock the phone, but this is not applicable to modern iOS versions

• Viral TikTok methods claiming to unlock iPhones without passcodes are unreliable and often do not work on current iOS versions

Important Notes

• All methods that remove the passcode will erase data on the iPhone unless you have a backup.
• You will need your Apple ID and password after restoring to bypass Activation Lock.
• If you forget your passcode, restoring your iPhone is the only official way to regain access

In summary, unlocking an iPhone without the passcode requires erasing the device via recovery mode using iTunes/Finder, using Find My iPhone to remotely erase it, or employing specialized third-party unlocking software. There is no legitimate way to bypass the passcode without erasing the data.