You can put more than 300 English characters to a single image under four categories and pass to your customers. We can call that image as a QR code. Today any one can generate QR codes free of charge from online QR code generators. BUT if you want to add a your own design to that QR code..., You can't no. At that point I can help you. I can add your own design to your QR code and make it more attractive. To read that customize QR codes you don't need to have special QR code readers. Normal readers will read them. See the examples from the images. I can create custom QR codes under following categories.
1. Pure text
2. Telephone numbers.
3. SMS
4. Urls
