Model : TP-MR3020 (3G/4G-WLAN-Router)

Hardware Version : Not Clear

Firmware Version : Not Clear

ISP :

Hi all,

I have the 3G/4G-WLAN-Router TP-MR3020.
I need the LAN SubNet IP 192.168.0. It was working fine for more then a half year also with G4-USB-Stick. Nothing changed.
Now, the WAN IP took over the LAN SubNet IP 192.168.0 and the LAN SubNet IP changes to 192.168.1.

I changed the LAN SubNet IP bach to 192.168.0. (without G4 connection) and it works. But if I plug in the 4G-Stick, again the WAN IP took over the LAN SubNet IP 192.168.0 and the LAN SubNet IP changes to 192.168.1.

For me, the WAN SubNet IP does not matter.
But, the LAN SubNet IP must be 192.168.0.
How can I set up this config? And why did it change suddenly without any changes?
(There are more Systems with the same SetUp in the same aria still working fine.)

Thanks for any help.