@AshutoshSingh Hi, please check if Smart Connect is enabled on Basic->Wireless page or Advanced->Wireless->Wireless Settings page, if it is enabled, the 2.4G and 5G WiFi will be combined into one...

@Amberchenai Hi, please check the SIM card status on Advanced->Status page, if it shows No SIM card when a working SIM card is inserted properly, please try the following steps to see if it will fix...

@CHM Hi, you mentioned that it was working before you upgraded to 5G router, may I know if you were using the same SIM card on previous 4G Router? and what is the model number and hardware version of...

@OtterlyFil Hi，NAT Type F is displayed on the Nintendo Switch which is connected to MR6400, right? Could you please insert the same SIM card into another 4G router and check the NAT type again? In...

@kanenas Hi，do you mean extending WiFi range? if so, yes, you could purchase a WiFi range extender to connect the existing router

@Itsuki Hi, for the point 3, if the same SIM card works fine on another device at same location, please help to check the network type and band working on that device. If you tested it on a...