I’ve done phone jack switches before but it was a very long time ago and I want to make sure I still know how. Therefore, I’ll watch a refresher video and be ready to fix it after a while. Like a month or two.
This one has had the “snap gazinta” removed, somehow, and there is nothing to hold the business end of the phone cord.
Actually, the snap connector is on the phone cord, but I presume you know what you’re looking at. It could be that the phone cord end has been damaged. They even get stepped on!
The advantage is that the most disposable part is the phone cord. Some places have several just sitting in a drawer.
On repairs, if you get down to just wires, they are all color-coded. Just do one wire at a time.