@ggaszton good news that TP-Link prepared a new firmware which works fine on my device, I mean it doesn't refuse the incoming call on the Multi-SIM. I suggest you to raise a support case with TP-Link...

I would like to request the following feature to the mentioned router: Allow to receive calls on the SIM card Background I use the mentioned LTE/4G router with a SIM card. That SIM card (called...