Generally the wireless credit card machines operate on the basis of the wireless networks. They require additional fees for providing cellular services. It is possible to use wireless credit card machine with an ordinary phone line where cellular service is unavailable. You can also set up the store and forward system if nothing is available. 

Some of the providers have set up satellite network facilities with their credit card terminal. The network is quite standard for the processing through wireless. Such network is designed especially for business and processing. The providers use Motient, CDMA or CPDP networks but the last one is soon going to be obsolete as it is abandoned. 

GSM networks use is common for brands like Cingular and T-mobile while CDMA is used by Verizon and Sprint Wireless organizations. These are the systems on which most of the mobile and cellular phones operate. 

Mobile commerce that is the latest method of processing the credit cards commenced only a few years back with the use of wireless point of sale swipe terminals. Thereafter it made its way into the PDAs or Personal Digital Assistants. 

Swipe wireless credit card terminal is more expensive compared to the regular wired terminals. However the advantage is that they do not require the normal accessories like electrical outlets or the phone jacks. Thus the method is becoming quite popular as an alternative method of credit card processing.