I just got an ATT compatible Galaxy Note II and use the straight talk service. I can't seem to edit or add the APN at all. When I go through more settings>mobile networks>access point names the ATT Phone shows up with the circle filled in so I click that and it takes me to edit access point but all the settings are grayed out and won't allow editing. Is there something I'm doing wrong? This is my first smart phone so I'm sure there's something I didn't do. Thanks in advance.