I need help unlocking my iPhone without a computer

If your iPhone is running iOS 15.2 or higher you can use the instructions linked just below which do not require the use of a Mac or PC:

How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support

If this does not work, then your only option will be to use a friends's Mac or PC to unlock and restore the iPhone. You could also take the iPhone to an Apple Store if you have one near you to use a Mac there.

If you forgot your iPhone passcode - Apple Support

If you have a backup of the phone, you can use the backup to restore the data on the phone during the new setup.

Don't share serial numbers on a public forums like this, serial numbers are privacy sensitive information.

If you're running iOS 15.2 or later, you can unlock a disabled iPhone without a computer. If you're running an older iOS version, you will always need a computer.

See this links for further reference

How to remove your iPhone, iPad, or iPod touch passcode without a computer - Apple Support

If you forgot your iPhone passcode - Apple Support