@Rodolphe33 Hello I made many tests : The only way to get the backup 4G is to disconnect the electric cable of my box if I just loose the line connection my tp-link doesn't switch in 4G he think the...

Hello yes if i manualy select the 4G/3G router mode it's perfectly work in 4G. I did not choose my internet profil for the wan connection it's appear automaticly, mybe this is the problem ?

Hello, I want my mr400 automaticly switch in 4G connection when i loose my adsl connection. I choose the wireless router connection and 3G/4G backup but it's not working. When i disconnect my...