How to change the APN setting (AT&T models)

If your AT&T camera is sending pictures inconsistently, one thing to try is to change the APN setting.

With the camera in setup mode:

Press the Menu button.
Scroll to the fourth menu tab.
Scroll down to Diagnostic.
Choose APN Setting.
Enter the password, which is 123456 for 4G models and 1234 for 3G models.
If you are using a Spartan SIM (solid white with the blue AT&T globe), the APN should be APNSP. If you are using an AT&T SIM (has some color on it), the APN should be either APNBR or APNBL. Choose whichever one it isn't.