Answer by  
                                                                                          breezygirl (27)
                                                            
                          
                          
                                                           There are two types of wireless networks: GSM and CDMA. All GSM phones require SIM cards because of the way a GSM network works. I am guessing that by "GoPhone," you mean AT&T's pay-as-you-go phone service, and AT&T runs on a GSM network, so any AT&T phones, including the GoPhones, require SIM cards.                                                         
                                                          
                                                        
                          
                          
                          
                         
                  
                      
Wrong! Yes they do. add a comment