Help with unlocking SIM

@user_ele8ma​ Found an apple forum answer about unlocking a SIM card. The network service provider needs to unlock the locked SIM card. Checked my iPhone and my wife’s iPhone and went to settings, general, about, carrier lock, and both iPhones show ‘SIM locked’. I request that Xfinity unlock both iPhones! Do you need additional information? Both iPhones are 14 pro max.