I forgot my passcode to unlock my phone. It's a Verizon Wireless Pantech PN-820 Smartphone with Windows Mobile. I know the default password is the last 4 digits of my phone number, but I changed it from that and can't remember what it is for the life of me. I've tried everything and still can't get it unlocked. It's an old phone, but I need to use it temporarily. Is there any way to unlock my phone if I don't know the code?

Thanks!!