@Txiku Hi，since the smartphone is not using Band 1 any more with the same SIM card, it should be caused by Carrier, maybe the Airtel has updated their base station in your area recently, it is...

@Mike1010 Hi, it seems that the DLINK DWM222 is not listed in the USB modem compatibility list of MR3020: https://www.tp-link.com/en/support/3g-comp-list/tl-mr3020/v3/ It means this USB modem is not...

Zorro16 wrote @Sunshine Hi. Thank you again. I rebooted through the app. I also disconnected from power for a minute. Are these the same as Factory reset? If not, what is the correct procedure...

@nickllambert Hi, may I have a screenshot of Advanced->Status and Advanced->Network->Internet page on the MR6400 when using with Digi SIM card? In addition, what is the hardware and firmware version...

@pepesz Hi, may I know if your MR600 is working on 3G/4G Router mode or Wireless Router mode? And is the WAN IP disaplyed on Internet part of Advanced->Status page a public IP address? Besides,...

@Zorro16 Hi, thank you very much for the reply. May I know if you tried factory reset the router as well? If not, please have a try.