4.8 billion. That’s how many people use social media. Let that sink in. That’s more than half of the entire world’s population. And it’s more than 90% of everyone who uses the Internet. That big number makes for one giant haystack. Now just imagine trying to find a needle in it. That’s where being able to run a social media search by phone number free comes in. We found the best ways to find anyone’s social media profiles by phone…