Definitely update FW on first camera. You’re probably right about batteries in it. Usually with lithiums, you don’t get any warning at all. I find the P number in the info strip of night pics to be far more reliable that the status report, especially for the older cams that don’t update status with every pic.
Steve’s right about FW updates sometimes changing your settings, but the midnight status report is always there so the camera should have checked in then.
If you were a newbie, I’d suspect you might be out of credits but you’re not. I’d still check credits. Another thing with Verizon is if you run out of data and are in safety mode, apparently the 3G cams work but the 4G ones don’t. It’s very unlikely that that is your problem but I’m mentioning it anyway.