I purchased theTL-MR3020 V3 in order to install it to my primary ISP Modem/router which is the Speedport Plus.
The Speedport Plus has the ability to connect LAN1 as WAN.
I want to plug in a 4G dongle to TL-MR3020 V3 and then plug in the TL-MR3020 using the LAN/WAN port to my SpeedPort modem/router.
I want to do this in order to use the 4G dongle as backup line of my primary line.
I tried to set up the TL-MR3020 as Operation Mode: 3G/4G Operation Mode with Ewan Backup but i did not manage to activeate the 4G as backup.
I spoke with ISP provider and they informed me that in Speedport there is no need to change something but i have to configure the TL-MR3020.
Is someone knows what settings should i do?