I've had the same number for 4 yrs.
If it works for you that's great.
I did have the same number for several years, until an SP, who has since become a regular, told me there was a bad report on my number somewhere. She said that whoever wrote it was not an established SP, and she didn't give it much credence.
I figured out who it was. It was a B&S that I walked from, the girl was horrific and built like a brick shithouse. She tried to persuade me that I would have a great time, but there was no way I could touch her.
https://www.ukpunting.com/index.php?topic=379502.0The report appeared shortly after that encounter.
So you never know what an SP is writing about you, that's why I change my SIM regularly.