So I've been researching half the night until I finally gave up and got a few hours of sleep. I've been unable to get my new 5X to show service with Cricket. Cricket is basically AT&T so I know all is good. What my question is that do I need the larger SIM card to use in this case as this device has dual SIM trays but separate. The first being for a larger SIM card. I currently have my small SIM card in the second tray with my SD card. It's recognizing it as the second SIM. I've not had this issue before and am seeking some knowledge and advice if you all don't mind. Is there a way to default the second SIM tray as the main reader or will I have to go to Cricket and have them program me a larger SIM card for the first tray? Any help would be greatly appreciated.