So Frustrated.  I upgraded to Blue curve 600 internet from 300 and got a new blue curve box and installed and it worked great for 1./2 hour then kept cutting out and called and no one could offer anything except that was a modem issue as they could see there were red spots where it was disconnecting and assured me it was the faulty modem and everyone kept telling me to plug back in and that it was the wires and flipped around the coaxal cables and didn't fix issue. I go in today and get a new one and tell the lady I want old modem back just in case as I have had for over 2 years and no issues ever. I wouldn't have ever upgraded except contract was up and the 600 was cheaper than internet 300. The new blue curve box has exact same issue AND they can't hook back up my old one and have to wait a week with no service until someone can come out. This is absolutely ridiculous. Looking for feedback from other what happened when they came out...were they able to fix? Seems a few people have have had similar issue. the box i have is the XB6-SI. I'm pretty sure sending  a tech out to try and swap out the coaxal cables that I have already done 4 x is not going to fix the issue. I am connecting a pc to it via ethernet cable and also having same issues via wifi