how to unlock my iphone through itunes on a pc

Hi dericka163,

From what you described in your original post, we recommend you try the steps in the link below since it sounds like you accidentally forgot the passcode on your iPhone.

If you forgot your iPhone passcode - Apple Support

To perform the steps in the article we suggested above, click and open the link, read the subheadings below, and try each step.

Step 1: Make sure that you have a computer (Mac or PC)

Step 2: Turn off your iPhone

Step 3: Put your iPhone in recovery mode

Step 4: Restore your iPhone

We recommend the steps above because they will show you what to do if you forgot the passcode on your iPhone.

Please let us know the outcome after giving the above steps a try.

Thanks for using the Apple Support Communities.

Cheers!