unlocker or password

The term Subsidy Password is used by Motorola and other handset manufacturers to refer to the 8-digit (or 16-digit code for phones such as the Motorola K1) unlock code necessary to remove the operator lock (also known as subsidy lock) from cell phones. This code is randomly assigned to individual cell phones by the OEM on request of the mobile service operator and prevents the use of a particular phone on a cellular network other than that to which the phone was originally sold.

View More On Wikipedia.org