HTC Touch Diamond you need to provide IMEI number (15 digits unique number). It can be found by
dialing *#06# as a phone number, as well as by checking in the phone settings of your device.This service can unlock all HTC models, it does not matter if the network comes from Europe, USA or any other place (excluding
list of unsupported networks), it can be unlocked on our website.
Please make sure that your HTC Touch Diamond asks for an unlock code, when you insert a simcard from a different network.
You can use any of the provides services, old, new, newest database it doesn't matter.