This is usually done in 1 of 2 ways: 1. iPhone NameDropBuilt into newer iPhones. Two unlocked iPhones come close together, then each person chooses what contact info to share or receive. 2. NFC digital business card: A physical card, phone sticker, keychain, or QR code opens a digital contact page. The other person taps or scans, then saves the contact. For business use, NFC cards and QR digital business cards are commercial tools. Popular options include Popl, HiHello, Blinq, Mobilo, Linq, Dot, and Tapt. Best business setup: use both NFC + QR so it works across iPhone and Android.