How do I keep my cell number private?

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Hello! So...I have two 800 numbers that I use for incoming calls. These two numbers help me track where my leads are coming from. However, I'm concerned about doing several calls backs from my personal cell phone. I've seen services such as Ring Central that have some col features but I dont agree with the pricing, then I always have the option of *67 but I don't want to seem sketchy when I call customers. Is my only option to get a separate business cell?