In response to Verizon Wireless' announcement last week that it would open up its network, AT&t made it known that it is opening up its wireless network to outside devices.

The problem how with this announcement is that it's always how AT&T worked. AT&T users have always been able to use almost any GSM phone on the company's network and swap SIMs. The announcement is more of a PR offensive. That may be because of the push by the FCC to require carriers on the 700MHz spectrum to provide open access to their networks. Or it might be to get in on the love being shown Verizon and Google for their embrace of "openness."

Whatever the motivation, though, all these changes on behalf of the major cell carriers are good news for consumers.

Telecommunications, also called telecommunication, is the exchange of information over significant distances by electronic means. A complete, single telecommunications circuit consists of two stations, each equipped with a transmitter and a receiver. The transmitter and receiver at any station may be combined into a single device called a transceiver. The medium of signal transmission can be electrical wire or cable (also known as "copper"), optical fiber or electromagnetic fields. The free-space transmission and reception of data by means of electromagntetic fields is called wireless. The simplest form of telecommunications takes place between two stations. However, it is common for multiple transmitting and receiving stations to exchange data among themselves. Such an arrangement is called a telecommunications network. The Internet is the largest example.