@Abdol Hi, Most of the time, One SIM card only has one operator, and the 4G modems(MR100, or MR6400) only support one SIM card. So I am a little confused about what you mean to choose a mobile...

@Gohr Hi, Have you seen this troubleshooting guide: https://community.tp-link.com/en/home/forum/topic/261882 By the way, May I know who is your SIM card carrier and how long have you had the modem?

@Santosh7.-_Safi Hi, the antennas are not broken and you might need to keep the main antenna(next to the DC port) properly installed.

@Nikosp4 Hi, Since MR6400 does not have the separate access point mode, so it is set to be wireless router mode with DHCP off and one of the yellow LAN port(not WAN port) on MR600 needs to be...

@slmn Hi, did you try the beta to fix the band? Or the beta did not help at all? If yes, could you please refer to the suggestions on this link and email me the required information:...

@Azis_prasetyo15 Hi, you could see the beta link here: https://community.tp-link.com/en/home/forum/topic/241534