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Mobile office services such as virtual banking and online-billing, video conferencing, online entertainment and access to the Internet.

Ability to watch television shows on phone, and it also allows to have video conversations with other people who also use the same 3G technology.

Map and positioning services.

Pay our bills and balance our checks by logging on to our bank account using the 3G devices that we have.

SUMMARY We briefly listed all the key technologies and protocols used in each generation of the mobile wireless communications. 2.5th Generation is a group of bridging technologies between 2G and 3G wireless communication. It is a digital communication allowing e-mail and simple Web browsing, in addition to voice. 2.75th Generation refer to the technologies which don't meet the 3G requirements but are marketed as if they do. 3rd Generation stands for the third generation of wireless communication technologies, which support broadband voice, data and multi-media communications over wireless networks. The 3.5th Generation generally refers to the technologies beyond the well defined 3G wireless/mobile technologies. The 3.75th Generation refers to the technologies beyond the well defined 3G wireless/mobile technologies. 4th Generation is the name of technologies for high-speed mobile wireless communications designed for new data services and interactive TV through mobile network. We have presented the overview, general characteristics and evolution of cellular network. We discussed about WiMAX technology which is 2.75th generation data services technology, EVDO technology which is 3rd generation data services technology, LTE technology which is 3.5th generation radio services technology, W-CDMA and UMTS technology which is 4th generation data services technology. We discussed about the current situation and future scope of cellular technology in Bangladesh and also discussed about all mobile operators in Bangladesh.

CONCLUSION We briefly listed all the key technologies and protocols used in each generation of the mobile wireless communications in the followings: 2.5G is a group of bridging technologies between 2G and 3G wireless communication. It is a digital communication allowing e-mail and simple Web browsing, in addition to voice. 2.75G refer to the technologies which don't meet the 3G requirements but are marketed as if they do. 3G stand for the third generation of wireless communication technologies, which support broadband voice, data and multi-media communications over wireless networks.


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