I purchased two TP-Link TL-MR6400 Router 4G LTE untis, one in 2019 and one in 2020. I am using a 4G SIM card from Tiscali Mobile, a virtual operator in Italy leveraging the TIM network. I use them for remote surveillance.

The one purchaased in August 2019 has been working perfectly, never one single issue.

The one purchased in October 2020, hardware v5 and already flashed to the latest firmware when I purchased it, it gives me plenty of issues. Every 2-3 weeks it disconnects from the Internet. When I drive and get by it and connect via wifi, I see that it has autonomously switched from the TISCALI profile to the next one in the list, which is named FASTWEB. Even if I reboot it, nothing changes, I have to manually reprogram the profile to TISCALI. Then sometimes it fails to reconnect and I have to reboot it. See the attached log from October last year.

I contacted the TISCALI mobile operator and they told me it is the profile that got changed... so they KNOW! but they claim it is an error in the router. They won't admit it may be a network message of theirs that causes this change.

Any suggestions? this is really painful, how can I relie on this setup for remote surveillance if it disconnects and I shall drive to fix it????

THANKS