An introduction to Mobile Phones

A mobile phone is a portable electronic device used for long range communication. In addition to voice communication, mobile phones support short text messaging service (SMS), emails, packet switching for accessing internet and multi media messaging service (MMS) for exchanging video and photos. The mobile phones are interconnected through a cellular network of base stations which in turn are connected to the Public Switched Telephone Network (PSTN).

There has been an explosion of mobile phones through out the world because they provide cheap, affordable means of communication and the market is growing rapidly. Because of widespread usage, the cost of mobile phones as well as the cost of service has drastically come down. Cheap mobile phones costing as low as £40 are available. Some of them are available free of cost under 12 / 18 months contract with cellular phone network providers. For example O2 mobile phones give LG KG800 chocolate model free with 18 month contract at £40 per month. Orange mobile phones offer the same mobile phone at £30 per month for an 18 month contract while T-Mobile phones offer it at £20 per month. 3g mobile phones also has similar offer of cheap mobile phones.

The offers vary widely with the no. of minutes of free talk time, no. of free text messages per month, free accessories and gifts, charges per minute for accessing landlines, same network, other network, etc.