Cell Phone Mysteries: What Are Dual, Tri And Quad Band Phones?
The world of the mobile phone is a confusing one these planar magnetic headphones, particularly for those wondering how to start a cell phone business. Few things are perhaps as confusing as GSM frequencies and GSM phones that seem to work in some parts of the world but not in others.Multiple band cell phones and GSM frequencies can be especially confusing for anyone wondering how to start a cell phone business.
The GSM network was first suggested by a group of European technicians and policy makers in 1982 and it didn’t take long for consumers and phone makers to adopt the new network after it first emerged in 1991. It wasn’t long before there was growing GSM coverage in an increasing number of countries.So what is the background behind the GSM network?
The GSM world grew quickly. There were more than one million subscribers spread over 70 carriers in 30 countries by the end of 1993.Not only did the new GSM mobile network send and receive all of its information digitally, making it the first 2G mobile phone to be developed it also gave users a great deal of freedom on what they did with it. For the first time they were able to send short written messages to each other for a fraction of the price of a phone call, they could change their carrier and/or go to a different country without getting a new phone.
All they needed to do was to take one GSM SIM card out and replace it with another GSM card and they were in business.