A mobile phone or cell phone is basically an electronic device that is used for communication. Cellular phones are very much different from cordless phones as they provide much richer functionality. Cordless phones can be used only for household or office use.

Nowadays the cell phones which we are using worked on full duplex technology, in this technology both the sender and receiver can communicate simultaneously with a very high speed of many megabits. Today, cell phones are using satellites for their own communication which is considered as a wireless communication. In wireless communication network, each mobile user has some area in which he or she is using a mobile system; each area is divided geographically into cells and each cell is having its own radio frequency.

Now most of the times you have noticed that when we visit somewhere other then our area then we came across a new concept that is roaming charges. They are the charges applied to use the mobile in that area of that network. Now the question arises that what is an unlocked cell phone? Unlocked cell phone is basically a telephone handset that we can use with many ISPs (Internet service providers), which help a user to switch from one service provider to another.

In past we are using mobiles for communication purpose only but nowadays cellular phones are providing excellent facilities at reasonable prices e.g. Email, Internet, SMS, MP3, Radio, GPRS service etc. Most of us want to make our cell phone’s data safe and secure. For this, companies provide various software and inbuilt security service like phone locking.

Recently we came across a new technology that is a 3G technology or we can call it as third generation technology, currently BSNL and MTNL service providers are providing this facility but in future each and every service provider would be able to provide this facility. Third generation technology allow us to transfer data at a very high speed mostly in Gigabits. In this we can send speech and data both simultaneously at a very high speed. This technology is also providing the facility of Live TV which is just amazing and it is in demand for the last many years.

This technology is also proving the facility of video-conferencing in which we can see the live footage of the individual to whom we are communicating which was not possible earlier because of slow speed and slow data transfer rate. If you are a regular user of cell phone and have come across many of the cell phone technology, you must know what is an unlocked cell phone.

Today, we need a high level of security and for that different companies are providing excellent features for security at reasonable prices with a new range of unlocked cell phones. So what is an unlocked cell phone? Unlocked cell phone is that which is not using any keypad lock or key guard service. Some of the cell phones are using SIM (Subscriber Identification Module) cards or they are using microchip in order to store the data of the user. Now we all know that all cell phones work with the help of particular software, which is a set of programs. Lock and unlock are software settings with the help of which we can maintain our privacy or security.