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In the age of smart mobile devices such as phones and tablets, 3G is an indispensable function. So what is 3G and the previous generation 2G?
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What is 2G network?
2G is an acronym for second generation mobile telecommunications technology that was first launched in Finland in 1991 .
The main features of 2G mobile connection are encryption of conversations and messages in digital form (an improvement over analog signals of 1G network), provision of various data services. for mobile phones.
The three outstanding features of the 2G network compared to its predecessors, 0G and 1G, are:
- Voice calling with digital encrypted signal improves call speed and quality .
- Provides services such as text messaging, picture messaging and MMS (multimedia messaging) .
- More efficient use of radio frequency spectrum enables more users per frequency band .
Thus, the introduction of 2G has helped save time and costs and importantly, wide coverage connection range.
Understandably, the 2G network only has the effect of improving the speed and quality of calls, but not deciding whether the phone can receive calls or not. Even if the information about 2G network being “dead” in Vietnam according to many sources is true, brick phones can still make calls , just will no longer support texting .
Tnhelearning.edu.vn has contacted Viettel about whether the 2G network will be cut off in Vietnam, Viettel still has no official information about this, so users can rest assured to use phone models. Common.
Back to 2G, since its inception, 2G has developed at a very rapid rate, present in 140 countries and has a subscriber count of nearly 1 billion. At this time, the term GSM has a new meaning that is Global System Mobile.
Currently 2G has become the old generation of networks by replacing 3G or 4G. However, 2G still has the ability to help users of ordinary phones and basic phones with basic and gentle internet connection.
What is 3G technology and how was it born?
3G is a term used to refer to 3rd Generation mobile communication systems. It allows mobile users to transmit both voice data and non-voice data (download data, send emails, instant messages, images, audio, video clips…).
The 3G system requires a completely different radio access network than the 2G system. The strength of this technology compared to 2G technology is that it allows the transmission and reception of high-quality data, audio and images for both fixed and moving subscribers at different speeds.
With 3G technology, providers can provide customers with multimedia services, such as high-quality music; quality video images and digital television; Global Positioning Services (GPS); E-mail, games,…
The first country to put the 3G network into widespread use was Japan and now around the world. Needless to say, we know how important 3G mobile networks have become in our lives.
The most popular 3G network is the HSDPA (High Speed Downlink Packet Access) mobile network system, developed from 3G and currently being provided to users by more than 166 carriers in 75 countries.
It delivers download speeds of up to 7.2Mbps (equivalent to 0.9MB/s). Currently, almost all carriers in Vietnam provide 3G networks with this speed for users.
So do we have any other choice to be able to experience a higher and faster data transfer rate to match the increasingly popular high-tech devices?
The answer is absolutely possible because recently, Mobifone network operator has applied new 3G technology for transmission speeds of up to 42 Mbps (5.4MB/s) . To make it easier to imagine, it is possible to imagine that instead of only receiving signals from 1 wave column, the new technology makes it possible for phones to receive 2 waves at the same time, doubling the bandwidth and helping to achieve theoretical speeds. up to 42 Mbps .
Advantages and disadvantages of 3G mobile network compared to ADSL internet
Advantage:
+ Can be used anywhere. Wherever there is a phone signal, there is 3G internet.
+ Suitable for customers with low demand for use .
+ Very suitable for travel, travel .
+ Meet online services : internet access, online applications, online teaching, online games…
Defect:
+ Shared bandwidth with other subscribers. When there are many subscribers to the same access, the speed will be reduced .
+ The speed is not stable but depends on the subscriber’s location, 3G base station and phone wave strength (sometimes it will be very low).
+ High cost . Because there is no package. You will have to pay a very high fee for the hobby of watching videos or listening to music.
Which devices support 3G?
Currently all smartphones and tablets support 3G connectivity with a common transfer rate of 7.2Mbps:
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