Does RingCentral really not offer caller id showing up on cell phones?

Hello,

I've got the caller id set to show as our company name when we call people. We want them to see the name of our company on their cell phones when we call. However, it either shows up as just the number itself or "unknown." Apparently, after talking to a RingCentral rep, caller id doesn't work at all with cell phones, only landlines. Is that really correct?

If that's the case, I'm having trouble understanding why any company that is trying to sell things would use RingCentral as a phone vendor. You can't make sales when your number shows up as "unknown" or just some random number instead of the company name, which clearly relates to exactly what our product is.

Am I understanding this correctly? There's really no way to have our company name show up on people's cell phones when we call them?

Thank you,