It's really strange. Have you tried validating the carrier? Performing localized tests with just the modem? Everything is working fine here.

@noizo I suggest you back up your settings and reset the device. I started the controller with the backup settings from the software I had on my PC. And since then, the download and upload rates have...

@Hank21 Woow!!! I didn't know about this detail. So, am I obliged to use DoT???

@Hank21 Oops! I'll close the problems here. I need to experiment with this situation more. It's clearly slower, but I really need to do longer tests. I don't have any more accurate answers about...

@Clive_A I appreciate your attention to this case and apologize if you misunderstood my position. I had done some tests with Whois and I had already seen this. To me, this is funny, because it worked...

@Hank21 I don't have a video and I don't have any proof, but I'll produce one and post it here. I know that just from what I posted, it's really hard to have a real idea of what the problem is. But,...