BigBlue1 questions... Been thinking of killing my direct TV and replace with YouTube TV but my internet with this Mobley needs more stability. Price on this netgear $100 spread on prices, how much did you pay and where did you buy? My Mobley has taken spells of being very sluggish, also keeps going off the air. I've put it on a timer to reboot every day at 4am, seemed to help. Did you just move Sim and it worked? Or did you need this PUK code I've read about. Are you using WISP with this setup or how is the config setup?
Good questions. Dealt with those myself. I actually just stated YouTube TV in Dec and will be dropping DirecTV soon. My setup has worked well for me streaming that, but even with the Mobley I could do Netflix and Amazon Prime Video just fine.
I found a 'refurb' Nighthawk M1 on eBay for $155. By 'refurb' I think they just meant that they did a factory reset.

But it works. Didn't come with a USB charger for that price, but I had an extra from my Pixel that works (it takes a high-output charger). I saw them from that price used up to maybe $300-ish on Amazon. I figured it was either going to work or not work and I bought from a seller with good return policy (free return shipping, 30 day window) so I was comfortable.
I had some Mobley challenges in the last year too. Mine would just drop its connection maybe once every week. A simple power cycle fixed it. But overall it was pretty much OK.
I don't know much about WISP. What I did was hook my M1 to an ASUS router that I previously had my Mobley hooked to. This time via ethernet instead of USB though. And then connected the Deco main unit to the ASUS. I'm guessing it isn't an 'optimum' routing setup but I have had zero problems with normal Internet use, significant video streaming and work VPN use through it. All wifi is now done via the Deco mesh and the ASUS is just 'bridging' (probably not the real term) the M1 to the Deco.
As for YouTube TV, it has pretty much met all expectations that I had for replacing DirecTV. Only minor quibble is that the interface isn't as easy to use as I'd like, especially the 'Library'/DVR stuff. Works, but lots of clicks on the remote to get where I want to be. Looking forward to saving $65/month with this replacement. And no 'satellite signal lost' messages!!
Rob