Solve problemsHelp and personal needsTo save the time and expense of anunnecessary service call, perform the simplechecks in this section before contacting aservice professional.When you switch on your phone, the“Enter PUK”•The PIN has been entered incorrectlythree times, and the USIM/SIM card isnow blocked. Enter the PUK supplied byyour service provider.“No service” or “Network failure”displays•The network connection has been lost.
