When I got my internet connection with Belong, I received a free Wireless ADSL/Modem router as I signed up for one year.
While I do not have any complaints to make with respect to the modem potion of it, the router was using ancient technology. No Gigabit Ethernet, no dual band Wi-Fi support and no 802.11ac support. Streaming performance from the NAS to my MacBook Air was terrible. The situation would not improve with my desktop PC, despite having dual band 802.11ac support, because the router was not capable of it. And, the 100Mbps Ethernet ports were, quite slow for 2016.
The telephone point in the apartment that I am renting, is located in the kitchen. (I don't know what the architect was smoking! Perhaps at the time the apartment was built, the Internet was unheard of.) The kitchen is attached to the living room. My desktop PC will be kept either in the living room (until we buy a TV) or in the 2nd bedroom. It was impossible to draw an Ethernet cable or a RJ11 cable from the kitchen to either of these locations unless I drew it on the floor. But I wanted it out of reach of my kid. I could not draw it along the wall because I would have to fit some hooks or nails on the wall to lift the cable up, which would mean damaging the property.
I did not want to keep the router in the kitchen as well. My wife would definitely spill water on it. The ideal location was the top of the fridge. From there, the PC would get direct line of site from the router if it was kept in the living room. My wife has no immediate plan to buy a TV, so the PC will most probably stay in the living room for a long time.
And I could move the NAS to the top of the fridge as well. Then it could be connected to the router via Ethernet.
Now all I needed was a good router.