Wireless Joint

Prob be best to flash the new ones with the same firmware image on the old one. Or you may need to ensure the settings are the same between them. The newer firmware shouldn't have nay new settings, just updated protocols and potential bug fixes. I would check: AT+QCFG="NWSCANMODE" AT+QMBNC...

The modem settings save automatically. You can make sure by running AT+QPRTPARA=1

You only need to run that once though, never needed again. IT just says, 'Hey make sure to always save settings to backup memeoy' .. basically.