@Virgo This is somewhat true for my scenario where I have only one active WAN with USB Modem acting as a backup - I am aware of that but that was not my point. 1. BUT even in this scenario clicking...

So your IPTV only works on one of these ISP links ? I mean one link has TV subscription with it and the other not ?

@Phuripat I have ER605 v.2 with OC200 running latest version ( 5.7.6 ? ) and the upgrade from ER605 v.2 firmware 2.0.1 to 2.1.0 went smoothly and I have none of the problems mentioned here. So it...

@Momro Are you sure that your LTE modem is supported ? I do not see E3372h on the list: https://www.tp-link.com/en/er605/compatibility/ I tried my ER605 v.2 with Huawei E3276s-150 and it did not work...

OK but I posted this info about a specific scenario which seems like a bug, while you are replying but referencing a possibly similar but still distinct problem. Why not post it in a separate thread...

@Mindau firmware 1.2.2 for ER605 is still beta, so it might be not listed on compatibility page. But as I and others already wrote, it works fine with this controller version. I guess it will be...