This is a bit complicated and will require you to buy a GSM SIMS card from a telecom carrier. Your second step is to make a GPRS setting in the SMS printer or you'll need a software that includes GPRS setting. In order to set this up and get it configured correctly, you should be a website programmer that understands the software or can integrate the correct software on your website. Even skilled programmers have issues getting this setup and working correctly. I have configured a few of these printers in the past, but it wasn't easy to do. Here is a great site that you can to follow the instruction of the setup process.