Unlocking your HTC Alpine frees your phone to work with any GSM network in the world.
It will remove the "Enter Subsidy Password", "Contact Service provider" or other "locked phone" message and allow your phone to accept SIM cards from any network.
Advantages of unlocking your phone include:
• Allows your phone to be used on any GSM network in the world. Avoid expensive roaming charges.
• Frees your phone to use SIM cards from any network.
• Increases the resale value of your cell phone.