@Ruijrmata Hi, your case is a little bit different; Could you please help me check the following information: 1.Can I have a picture of your network topology? 2.May I know who is your internet...

@Swall_Gemellaro Hi, Thanks for your patience and please feel free to contact the local shop retailer or support team to check for warranty service.

@Tiru1310 Hi, have you checked whether the SIM card has been inserted firmly? Did you use the original SIM cardholder? Have you tried to reboot the modem with the SIM card inserted? If still nothing...

Update: Manual Band Selection for 4G WiFi Routers

@Kathir related post: https://community.tp-link.com/en/home/forum/topic/257116?replyId=580280

@DDave Thanks, and please feel free to keep us informed whether call forwarding would help or not.