The technology of mobile phones has gained much popularity now days. Most people are making use of the various services offered by the mobiles.

A mobile phone is a mobile gadget meant for voice and data communication over the network of base station, sites where antennas and electronic communication device together creates a cell in a mobile phone network.

The mobile phones have turned out to be a necessary device for almost all the people.

A mobile phone is a two-way radio as it sends and receives radio signals with cell site base stations. When a person speaks on a mobile phone the voice message gets changed into radio waves.

The radio waves pass through air until they reach a base station close by. The base station sends the call across the communication network after which the call reaches the right receiver of the call.

The base station in the vicinity of the mobile phone being called sends the radio waves for the receiver's gadget to sense them.
The mobile phone of the receiver converts the signals in to voice and the phone call takes place.

The base stations are equipped with microwave antennas and mounted on top of big buildings.

They possess low powered radio transmitters that transmit communications between the mobile phones and the switch. The switch connects the call to the other users of the same service provider.

The mobile phone gets power from batteries that can be recharged from mains power. Nickel metal-hydride batteries or lithium ion batteries are used in mobile phones.

The recent mobiles make use of lithium-polymer batteries that are lighter in weight and render flexibility in shapes.

Below the mobile phone battery there is a small micro chip called Subscriber Identification Module, which is also known as SIM card. This chip stores the mobile phones configuration details and the details of the phone.

When the mobile phone is switched on, it registers with the switch which can then alert the mobile phone of incoming calls.

The best mobile phones device observes the signals being sent by the near by base stations and switches smoothly between sites.

A mobile device can switch between networks without disturbing an on going call by transferring a call from one channel to another. This process is termed as a hand off.

When you are comfortably roaming with your mobile phone the telecommunication network in the world is working, making and maintaining the calls and helping you stay connected.

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