In a digital era that values privacy more than ever, sharing your personal phone number can feel like a big step regardless of whether it’s with a new friend, a co-worker, or even your next-door neighbour. Typically, when you exchange contacts via text-messaging app WhatsApp, you’ll need to share your number or take the other person’s phone number. Either way, you will both get to see each other’s contact digits after making the exchange and pressing save.