Forgetting your iPhone password can be a frustrating experience, but with iCloud, you can easily reset it and regain access to your device. Here's a step-by-step guide on how to reset your iPhone password using iCloud:

1. Go to iCloud.com and sign in with your Apple ID.
2. Click on 'Find iPhone'.
3. Select your iPhone from the list of devices.
4. Click on 'Erase iPhone' to reset your device and password.
5. Follow the on-screen instructions to complete the reset process.

It's important to note that resetting your iPhone password with iCloud will erase all data on your device, so make sure to back up your important information beforehand. By following these simple steps, you can quickly regain access to your iPhone without having to worry about a forgotten password.