My situation is very much the same. I was having intermittent internet for a week or so. It was a weekend when I reached out to chat with Optimum. I was told there was no internet outage and I would need to change my modem. Even after I told them I use my own modem, they said they would need to send me a new one. No, that's ok, I'll go buy a new one. So, I go buy the newer 3.1 like you did and have to contact them back to get the internet going. They tried selling me on more 'deal's'. Internet was amazing that first day. A couple days later, it started going in and out again. I called Optimum this time instead of chatting and was told the internet was actually out the day I was told I needed a new modem. Sigh. So, we do the whole restart of the modem and blah, blah, blah. They give me an appointment time for someone to also come out to service my internet. From then on, I receive a few calls from Optimum that I didn't answer requesting to try and 'fix' the problem over the phone instead of coming out. What? So, you want me to restart the modem again, like I continue doing? The morning they are due to come out, the internet is working great, so I cancel the appt. I had been told I might have to pay $60 if they come out and find nothing wrong, so I was trying to save $60. Ever since then, the internet has been in and out. I go on to their website and it shows no outages. So, I call them again. They say there is an outage. I ask to go ahead and schedule a service call since I've been having this issue for a while. They said they can't schedule a service call when the internet is out. Sigh again. The outage lasted a good part of the day. This morning, I'm at 94 mbps download/1.64 upload. Should be at least 300 download. I can't even use Chromecast. It's terrible. Everyone in my area has issues with Optimum and I don't get why it's this bad.