I had issues with being unable to connect to 5g and at times the router would state that it was unable to register the SIM with the network. There was very little stability with the connection.
My solution was changing the network port from PCIe to USB. Others have stated that this would slow the connection speed. I get 200 Mbps using a VPN (wireguard) and a DNS filter. But most importanty, I now have stability using this method. The router is using 4.4.13 firmware. .
Switch the modem network port between PCIe and USB interfaces:
1. Connect to the AT commands (/dev/ttyUSB2) port using
e.g. minicom: minicom -D /dev/ttyUSB2
2. Check the current modem mode with 'AT+QCFG="data_interface"':
- 0,0 indicates that the network port uses the USB interface
- 1,0 indicates that the network port uses the PCIe interface
3. Switch the active interface with:
- 'AT+QCFG="data_interface",0,0' to use the USB interface
- 'AT+QCFG="data_interface",1,0' to use the PCIe interface
4. Reboot