Share your personal contact information with an QRcode to your customs or friends or clients. Use serval different QRcodes for your different contact profiles.
Each other smart mobile can read this QRcode with its build-in camera. While the camera is scanning the code, it detects a Virtual Contact File (VCF) inside the code. It decodes the contact information and passes it on to the address book, thereby, creating a new entry. You can, therefore, store a new, fully filled contact with just the tip of your finger.