My Samsung Gusto 3 is giving me a message that there is no SIM card in it, despite a SIM card being in the phone. When I press the left soft key to select the Unblock option (pressing the right soft key selects SOS), I get a message which reads as follows:
Please enter network unblock code (15 digits)
Remaining:5
How can I find the network unblock code? Thanks for any help!