Okay, I finally just had to call Consumer Cellular and make sure the phone was activated correctly, give them the IMEI number, etc. After a restart, it's working fine, with LTE, didn't need to edit my APN
I have Nexus 5x and trying to enter an alternate APN for my carrier but currently this technique appears to might work, I do just the first couple of settings, it saves. But then I go back in and try to save more settings and it will disappear. Rather frustrating.