Question Laptop ram upgrade: Any brand will work?

Sep 14, 2019
So I've been searching the forums but none comes up. I'm planning to upgrade my laptop's ram. I already understand technical specs (DDR3, same brand pairing, etc.) but my only concern is if manufacturers actually brand lock their laptops to use their own model ram?

I have a lenovo laptop and I found some cheap samsung laptop rams online. Will it work with my laptop?