I have a tmobile highlight and i forgot my sercutiy password

Hi,

if you connect your phone to computer via USB and you can see phone as modem in device manager you can contact http://www.fastgsm.com/en/page/support and they will help you to recover your phone code without erasing data inside your phone.

You can reset your security code by updating firmware but this way you will loose all data inside your phone.

gsmwong