2G和3G蜂窝网络之间的区别

1.第二代(2G)：
2G移动网络基于GSM(全球移动通信系统)。该技术是1991年在芬兰开发的。使用此技术对邮件进行加密。该技术中使用的数字信号消耗更少的电池，因此导致更少的功耗。还提供了手机数据服务。进阶版本是2.5G和2.75G。

2.第三代(3G)：
3G移动网络是2001年在日本开发的，旨在达到2G技术所缺乏的最高速度。这项技术的标准是由国际电信联盟(ITU)制定的。这项技术为用户提供了诸如GPS(全球定位系统)，视频会议和移动电视之类的服务。

2G和3G蜂窝网络之间的区别：

2G	3G
Network construction and maintenance is cheaper.	Network construction and maintenance is costlier. License fee to be paid for 3G is also higher as compared to 2G.
It provides slower download speed and slower access to applications.	Faster access and download speed for applications.
2G is less compatible with the functions of smart phones. Data transmission rate can be of 50, 000 bits per sec.	3G is widely used for smart phones. Data transmission rate can be more than 4 million bits per sec.
It is less secure than 3G.	Highly secure as 3G network permits validation measures.
Video calls cannot be made.	Video calls can be made.
Downloading and uploading speed is upto 236 kbps.	Downloading speed is upto 21 Mbps and uploading speed is upto 5 Mbps.