To find a phone number from a LinkedIn profile, use the profile link as the input to a phone lookup. It returns a direct or mobile number, or nothing. The number does not come from the profile page: it comes from data sources that already hold that person, and the link tells the lookup which person you mean. That is how to find a phone number from a LinkedIn profile in one step, and the planner above opens on it, with what it needs and its price.
How to read the result
The result is one number in one field, and it does not say whether it is a mobile or a desk line. A desk line goes stale with a job change and a mobile follows the person; the direct dial phone numbers guide covers the difference.
A number that starts with a plus carries its country calling code. One without a plus came back in national form, and nothing adds a code, since that would be a guess. There is no check that a number works: it comes back found or not at all.
Email and phone from one profile
From a profile link, a phone number is one step and a work email is two, because the employer has to be read first. The email from a LinkedIn profile page explains why.
What to do next
For a list, import it into a Oneprofile table and keep the LinkedIn link column, plus names and companies if you have them. Run the phone lookup on a handful and read what came back before you run the rest. If your dialer wants one international format, the E.164 phone number converter does that for a whole list.
When you call, say where you got the number. In the EU, Article 14 of the GDPR asks you to tell people where their data came from, at the latest when you first contact them. This is not legal advice.