Reinstall the router?

[linkn]

Dear,
I want to reset the wifi password, but my router lost its id and pass. How do I do now?

But how do I know which one it is?

[Chrispcritters]

There is usually a reset button or pinhole on the back of the router that needs to be pressed for 10 or more seconds while the router is power cycled.

If that doesn't, you can usually look at the bottom router to fid the manufacturer and model number.

What that you can either google that and "factory reset" or check the manufacturer's website.