First of all, call your carrier and ask nicely, if your contract has expired, they'll hopefully unlock your phone for you.
If you tell your carrier you'll be travelling and wish to use
a SIM card from another country to save on roaming fees, they may also unlock your phone for you.
If you're on pay monthly, you need to have had your contract for six months before you can unlock a device. If you're on pay as you go or SIM only, you can unlock your phone as soon as you get it, as long as it's locked to EE, Orange or T-Mobile.
You can also unlock screen code and sim-card of Htc HD2 mobile phone. But you need to do first unlock code for it's operating system.
If the unlocking code is not working for Htc HD2, you need to enter your phone IMEI number to the box to get new one.
All codes are generated by us.