@TP-Link Thanks - I think the problem is most likely with the card reader and not the MR-400. Other devices connect to the MR-400 with out any problem. I guess the card reader has advanced security...

Thank you for your reply. I couldn’t do the test that you requested because my smart phone will not allow personal hotspot to function when connected to my home WiFi. Today I took the router and card...

I have just purchased an Archer MR400 MiFi router and need to use it to allow a SumUp Solo card reader to be used in an area with no WiFi signal. The router seems to be working well when connected to...