Unlocking a HTC Desire HD requires a HTC unlock code. An HTC Desire HD unlocked should work on any GSM phone networks or carrier. Most GSM or SIM based cell phones come with a SIM lock which prevents them form working with unaccepted carriers. The unlock code should remove the SIM lock on your HTC Desire HD.
In order to get a HTC Desire HD unlock code, I would first contact your phone carrier’s support line and request one. Sometimes they will give you one for free and in exchange will need your HTC Desire HD’s IMEI number. You can get this number simply by entering *#06# on your phone’s keypad and then pressing enter. If you cannot attain a free HTC unlocking code, then you should review some of the unlock code websites I have provided below.
You should now be able to use your unlock code and the steps below to fully unlock your HTC Desire HD to other carriers. Enjoy!
How To Unlock HTC Desire HD
1. Turn on your HTC mobile phone with an unaccepted/foreign SIM card in (or no SIM card at all).
2. Now, enter your 8-digit unlock code you recieved from earlier.
3. Your HTC mobile phone should be unlocked and may automatically reboot!
If you have any additional questions or concerns about unlocking your HTC Desire HD, please feel free to post them below. Thanks!