FBI is the title manager that reads QR codes. After hacking your 3DS, FBI is usually installed automatically. If not, install the FBI .cia via the standard method first.

(3DS executable) file to a computer and manually moving it to an SD card, users can use the FBI application to "Remote Install" via a URL encoded in a QR code. Speed and Convenience

: When the URL pops up, select "Yes" to begin the download and installation.

// Read the QR code image data char qr_code_data[256]; fread(qr_code_data, sizeof(char), 256, fp); fclose(fp);