Hello all Sifus, I have to let you guys know that I have 0 knowledge in wifi, modem and routers. I need help in getting a better modem/router for my parents.
First of all, I am using Time (stay condo), its super fast and stable nothing much to complain, but my parents house currently using Maxis (landed property), always got internet disconnecting issues, unstable speed, sometimes fast, sometimes slow even when the plan is 100Mbps.
I attached a picture below, hope you can see the maxis setup.

I want to change this setup, would like you guys to kindly recommended me a modem/router (one unit/ or I need to get separate devices, im not too sure).
The property in which this new setup will operate is a double story terrace house (size roughly 900 sqft first floor and 1000 sqft ground floor).
House type: Landed
Size of house: 900 sqft first floor and 1000 sqft ground floor
Features required: No need special features
Number of devices connected to WiFi: 4 devices
Internet Speed: Maxis 100Mbps
Budget: 300-400
Just to add on a bit, is that silver box thing the modem? and do i need to change it? The other piece should be the router which will need replacement.
First of all, you need to know it is due to the black box faulty or line not stable, if line not stable even changing modem wouldn't help....
to find out.