I've been having a lot of trouble setting up my new unlocked Kyocera Gratina 4G. Whenever I go to add an apn, it says this "apn settings are not available for this user". I tried to just add one anyway, it let's me fill out all the fields but it won't save the apn.

If anyone has any idea how to fix this I would appreciate the assistance. I'm in the US with both At&t and T-mobile sim cards, if that helps.