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2. vCard - Wikipedia

   en.wikipedia.org/wiki/VCard

   vCard, also known as VCF (Virtual Contact File), is a file format standard for electronic business cards. vCards can be attached to e-mail messages, sent via Multimedia Messaging Service (MMS), on the World Wide Web, instant messaging, NFC or through QR code.

3. File:Qr-code-ver-40.svg - Wikipedia

   en.wikipedia.org/wiki/File:Qr-code-ver-40.svg

   QR codes may be used to display text to the user, to add a vCard contact to the user's device, to open a Uniform Resource Identifier (URI), or to compose an e-mail or text message. Users can generate and print their own QR codes for others to scan and use by visiting one of several paid and free QR code generating sites or apps.

4. MeCard (QR code) - Wikipedia

   en.wikipedia.org/wiki/MeCard_(QR_code)

   MeCard is a data file similar to vCard but used by NTT DoCoMo in Japan in QR code format for use with Cellular Phones. It is largely compatible with most QR-readers for smartphones. It is an easy way to share a contact with the most used fields. Usually, devices can recognize it and treat it like a contact ready to import.

5. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_Code

   Users may receive text, add a vCard contact to their device, open a URL, or compose an e-mail or text message after scanning QR codes. They can generate and print their own QR codes for others to scan and use by visiting one of several pay or free QR code-generating sites or apps.

6. How to make sure texts and calls are encrypted after the FBI ...

   www.aol.com/news/sure-texts-calls-encrypted-fbis...

   The U.S. believes Chinese intelligence hacked into AT&T, Verizon and Lumen Technologies and gained significant access, including records of phone calls and text messages for many people ...

7. Wikipedia:WikiProject QRpedia/user guide - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:WikiProject...

   If possible, providing free Wi-Fi hotspots will facilitate more use of the codes, especially in remote or thick-walled buildings with unreliable mobile internet connections. Display the codes where people (including children, and those in wheelchairs) can reach them. The codes should be well lit. Shadow makes it more difficult to scan.