So my ISP decided to introduce VDSL2 allowing me to upgrade my subscription from 20/1 to 40/4 for the same price(about $74/month).

Sounds like a good thing right? The problem is that my router, the Billion BiPAC 7800N, doesn't support VDSL2 and only supports bandwiths up to 24 mbit. They want me to get the Technicolor TG789 VN V3 as that is the only router they officially support.

The problem with this is that I have previously tried this router for troubleshooting purposes and it is very hard to configure and has a useless web interface.

There are two things I really want to change:

1. The IP address of the router. The reason for this is that some of the devices I have are set to use static IP adresses(since it seems to work better) and expect the router to be 192.168.2.1 and not 192.168.1.1. This is the less important point.
2. I use Unblock-us to access US Netflix instead of Danish Netflix. So I ideally need to be able to change the DNS settings of the router to use the correct DNS servers. When I last tried the router I could never figure out how to do this, Googling didn't help but instead made it seem impossible.

Any ideas or suggestions on what to do?

If it's pppoe you can install Mikrotik router and say fuck off to any manufacturer's router.

You should have a Advanced then Configuration on the lefthandside.
Under that should be the LAN and WAN settings.
Options in there should allow you to change the IP address and disable auto DNS manually config (unless im wrong - looking at a 7800N router screen here -- we use the defaults however)

(Using 1.06h firmware here)

Yeah changing those things was a breeze with my current routee, that is the Billion one. The Technicolor router is the one they want me to get. This appears to be its manual: http://setuprouter.com/router/technicolor/tg789vn-v3/manual-1252.pdf

As far as alternative routers go, there is basically only one other VDSL2 supporting router being sold in the entire country, the Asus DSL-AC68U, it gets great reviews and it seems like it could really help with my Wifi problems(it is a two story concrete house) but there are two major issues:

1. It is not supported by my ISP.
2. It is expensive. 3x the price of the Technicolor router at about the equivalent of $260 - $270.

My ISP just switched over to using DHCP if that matters. Edit: With my current ADSL2(+?) connection they are using PPPoA. With the new VDSL2 connections they are using DHCP.

DSL is an ugly technology to use, since it's very third-tier. So you really don't have amazing options, alas, like you might with fiber or cable. Depending on how much control you want over your device, and how much you're willing to learn, you may find that some refurbished cisco or Juniper devices can do for you at a reasonable price. That might be a silly choice, and unreasonable.

So failing that, the manual you linked to shows that the router IP is changeable, and if you really have trouble with your DNS, you can always use a HOSTS file locally and bypass DNS for specific addressing. It's not as much hassle as it might sound.

w/r/t wifi, you're pretty much at the mercy of RF. I haven't used wifi for ages except as a backup, because wired is just so preferable. Even running a few wires through the house/apartment to the places you'll use your devices ends up being less hassle than optimizing wifi in a signal graveyard, but if you insist, perhaps you should look into getting a $30 wifi repeater and setting your router and repeater up on roughly opposite sides of your place, to minimize path loss.

"Depending on how much control you want over your device, and how much you're willing to learn, you may find that some refurbished cisco or Juniper devices can do for you at a reasonable price. That might be a silly choice, and unreasonable."

If a store doesn't sell it here then is very very hard to get it. When I bought my Raspberry Pi I had to scroll through pages and pages and pages of dealers on Amazon before I found one that would ship to the Faroe Islands.

Even if I should happen to find someone willing to ship a router here there are plenty of issues like the mail moving at a snailpace and support/warranty issues.

As far as what I can buy at stores..well that is extremely limited. That Asus router is the only other router with VDSL2 support that I know of, even though the store that sells it will soon have a cheaper Asus model. Some of the downsides of living in a country with roughly 48000 inhabitants.

As far as the Technicolor router supporting a change in IP address, I guess that is technically true, but when I tried last time it took me hours to get the changes to stick. Its interface is the most infuriating piece of shit on the planet.

What is the host file thing about? I have no knowledge about or experience with HOSTS files. But I know how to manually set up the DNS server adresses on all my devices. However in my experience changing it centrally on my router works much better.

Wired connections would be very nice but they are not really an option since I don't have the neccesary skills to set it up. I have zero skills when it comes to drilling or the like. Paying someone to do that stuff is too expensive.

I do however have two Asus RP-AC52 repeaters that work reasonably well.

To the first, I don't have hands-on with one of those, so I can't say for sure, but usually if you want to make a change to a network device like a router, your best bet is to unplug anything except the computer you're using to manage the device, make the change, save the change, and power cycle the device. It should stick. Once it's back up and running, you ought to be able to plug other devices in (or at least move off the management interface) with no hassle.

You know it's called a HOSTS file. You ask questions that show you know how to do things, so I'm going to try a "lead the horse to water" approach unless you come back and say it's too tough to figure out. Google how to set up a HOSTS file for your version of O/S. It's fairly straightforward, and doing it from scratch will teach you a lot about the basics of name resolution. It should take you perhaps an hour to get it sorted, assuming you screw up the first time.

I always screw up something new, the first time.

EDIT: About running wires: you don't need to do carpentry if you get to make the rules in your house, or can get permission. Run ethernet along the floor against the wall. If it's on carpet, staple it down every few meters. If it's on hard floor, tape it down every 50-100cm with good tape. You end up using a bit more cable than you would if you ran directly through walls, or had a router in the ceiling and ran drops to patch panels in the walls, but cat 5e is cheap. Just an option to consider.

Well I received the Technicolor router in the mail today. Without a manual. It came with some instructions from my ISP, they tell me to wait plugging it in until I get a text message from them. I will Google HOSTS file. But this is a desktop OS concept right and won't help with my mobile devices, right?

Previously I have edited the DNS addresses on my individual devices like illustrated here: https://support.unblock-us.com/customer/portal/articles/291571?_ga=1.125350984.335281813.1445686092 and here: https://support.unblock-us.com/customer/portal/articles/809202?_ga=1.125350984.335281813.1445686092

Edit:

As I feared it seems editing the HOSTS file on an Android device requires rooting: http://www.howtogeek.com/140576/how-to-edit-the-hosts-file-on-android-and-block-web-sites/

Can you run the old router through the new one?

ISP >> New Router >> Old Router >> Clients (PCs, other devices, etc.)

That's what I do with my equipment:

ISP >> Modem/Router >> DLink 605L >> Clients

The modem attaches to the raw DSL line, the DLink's WAN is attached to the modem as a LAN client.

That way, we can specify DNS servers for all devices on the network

" Can you run the old router through the new one?" I was thinking about that. Based on my reading of the two manuals I am not sure if this is possible or not. The Technicolor router's nanual seems to indicate that it can act as a "gateway" with another router acting as a modem but it is not clear if the opposite is possible. The Billion router's manual basically says the same. So I don't know. In my case the Technicolor router needs to be the one that is connected to the internet.

"That way, we can specify DNS servers for all devices on the network"

In one central place? If so that is exactly what I want to achieve. If I can hook up the Billion router to the Technicolor one and get all the devices on the network to use the DNS servers specific by the Billion router's settings I will have accomplished my goal.

According to this link: Billion 7800N, specifically the "Application Diagram," it looks like you can connect it to a modem that provides the internet connection.

Thanks, cool. Hopefully I can such a setup to work.

After looking at the manuals, it looks like the 7800N needs to be setup in "Broadband Router Mode" while the Technicolor as "DSL Gateway"

I think it might be as simple as connecting the Technicolor to the internet, and run a cable from one of its Ethernet sockets (yellow) to the EWAN socket on the 7800N.

This is interesting, did you figured it out?