Slow Wifi with brand new Surface Book 2!!!

You know, at this point I just want my $3000.00 back. I'll wipe the SB2 and return it to them if I can just have my money back. I have already replaced this machine because it doesn't work as advertised. Forget network speed, I've tried to use it just doing work and it can't do that. It keeps "pausing" for just a second every few minutes like it's trying to do something else, probably trying to call home on it worthless network connection.

Really, all I want at this point is my money back.

That's unusual and never happens on my SB2... which leads me to think it's a software issue.  Have you tried a clean install of 1903?  I run my SB2 hard... often using two external displays, multiple desktops, simultaneous downloads, etc and everything is extremely fluid.  Not a single hesitation unless it's a known program at fault (eg, an alpha/dev build of Edge or some other beta software).  The latest Win 10 1903 even sped things up a bit.  Couldn't be happier.  Again, I'd suggest you start fresh with the latest Win 10 build, let it pull the requisite drivers, then incrementally install your apps to see if you can nail down the culprit.

You know, at this point I just want my $3000.00 back. I'll wipe the SB2 and return it to them if I can just have my money back. I have already replaced this machine because it doesn't work as advertised. Forget network speed, I've tried to use it just doing work and it can't do that. It keeps "pausing" for just a second every few minutes like it's trying to do something else, probably trying to call home on it worthless network connection.

Really, all I want at this point is my money back.

That's unusual and never happens on my SB2... which leads me to think it's a software issue.  Have you tried a clean install of 1903?  I run my SB2 hard... often using two external displays, multiple desktops, simultaneous downloads, etc and everything is extremely fluid.  Not a single hesitation unless it's a known program at fault (eg, an alpha/dev build of Edge or some other beta software).  The latest Win 10 1903 even sped things up a bit.  Couldn't be happier.  Again, I'd suggest you start fresh with the latest Win 10 build, let it pull the requisite drivers, then incrementally install your apps to see if you can nail down the culprit.

It could be software. I know my SB2 was not constantly throttling to .4GHz and the fan was working on 1703/1709. I started getting BSODs and throttling more recently on 1803/1809. Hard to know if its a SB2 driver/firmware issue or Windows 10 issue. I dont think MS has even released updated SB2 drivers/firmware in a while and I dont see the pack for 1903 yet. Are you saying you did not install the Surface Book firmware/driver package after installing 1903?

The slow Wifi is all over these boards.  I think it has been shown to be the Marvell Wireless Network adapter.  SB2 owners have been abandoned by Microsoft.

I have exactly the same problem, I have placed a Surface Pro 4 alongside the SB2 with the same adaptor connected to the same network and the speed differential is astounding.  The SB2 wireless network speed is both inconsistent and frankly retarded.  Its been a decade since I returned brand new hardware, but this is likely to be a reset for me.  Really disappointing.

I Had been having the same issue on my Surface Book 2 15" after installing 1903 updates.

I have fixed the problem by deleting all paired bluetooth devices, including surface pen, what I thought to be the main cause.

Surface pen disturbed my network and bluetooth several times before. 

After re-paired surface pen, there seems no issue at all.