@Attila81 

Hi

Thank you for sharing your suggestion in the community.  Your insights are valuable to us as we strive to enhance our products based on user needs. If you have any more ideas or feedback, please feel free to share them with us. We also welcome other users who have similar needs to vote and engage in the discussion.

Due to functional limitations, the MR500 does not support VoLTE. Therefore, the most efficient solution at this time may involve considering a SIM card change for the router.

  @Joseph-TP 

I have the same issue with a DECO X10-4G which is annoying since I used an older TP-Link M7350 mobile internet pocket router without any problem.

I kindly ask TP_Link support to quickly handle the issue, since the current bug makes me impossible to use their new products and so I (and problably other MultiSIM users as well) will have to bring back the routers to the wholesaller.

I have to emphasze that this MultiSIM offering is very populer here and will probably take over single cards since the network providers are using it as a tool to bring all the mobile internet contracts to a single provider...

Looking forward to hearing about the solution (which might be easy, since it is still workoing proerly on older tp-link devices).

  @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 support.

  @Attila81 Hi, I have exactly the same problem. As far as I know, the firmware of my router is up to date, but the issue is still a thing. Would you be so kind to give me a detailed instruction how to solve it? Thanks in advance!