I have a TP-link travel router (TL-WR902AC) and a D-Link 4G LTE USB adapter (DWM-222) with a Free Mobile (in france) SIM and I am trying to set up a wifi network using the 4G USB modem.

if i put the SIM into my phone and create a hotspot, I can use the TP link travel router to create a wifi network from that.. and if i put the SIM into the USB adapter it works in my laptop to access the internet - but I cannot get the USB adapter to work when I plug it directly into the tp-link travel router.

I have removed the PIN from the SIM card, and also updated the firmware for the TP-link router and USB adapter. when i have the USB adapter plugged into the router the light on the adapter indicates that it is connected to the internet, but when i go into the router settings it says "USB 3G/4G modem: Unplugged", I looked at the documentation for the the TP-link travel router and it says:

If your 3G/4G USB modem cannot be identified by the router, please follow the steps below to have furtuer configuration.

1.Download a most recent 3G/4G USB modem configuration file from our website
www.tp-link.com.

2.Visit http://tplinkwifi.net, and log in with the username and password you set for the router.

3.Go to Network > 3G/4G Settings > Modem Settings.

4.Click Add New.

5.Click Choose File to locate the file you have downloaded and then click Upload.

But i cannot find anywhere on the tp-link website that has modem configuration files..

is there anything I can do to make the TP-Link travel router work with the USB adapter that I have?