Beginners guide for smartphone SIM network

 What is a SIM?

SIM

So SIM stands for Subscriber Identity Module which is widely known for SIM card. SIM is a type of IC(Integrated Circuit) that securely stores International Mobile Subscriber Identity (IMSI) number and other related terms regarding the same. This is used to identify the authentic subscriber on a mobile device.


What is GSM?

GSM stands for Global System for Mobile Communication (GSM). This standard is developed by the European Telecommunication Standard Institute(ETSI). It is the most popular mobile communication standard.


What is CDMA?

CDMA stands for Code Division Multiple Access. This network standard is designed by Qualcomm in the USA. Initially, it is used in the US and some parts of Asian countries. Over a Period of time CDMA is replaced by 2G and 3G network technology.


What is 3G?

It stands for “Third Generation” technology for wireless mobile telecommunication. 3G comes after 2.5G and 2.5G GPRS networks. 3G service commercially launched in 2003. 3G service provides an information transfer rate of 144kb/sec.


What is 4G?

4G stands for “Fourth Generation” broadband cellular network. Of course it is faster than 3G but faster than 5G. As 5G is not still commercially available 4G is still king in the market. 4G network offers 14MB/sec download speed which is 5 times faster than 3G.


There are two types of 4G network:

1)WiMAX (Worldwide Interoperability for Microwaves Access)

2)LTE (Long Term Evolution)


The most widely used type of 4G network is LTE. 4G also offers Voice over LTE (VoLTE). This allows us to make internet based calls with much stable and clearer connection for voice calls.


What is 5G?

5G is “Fifth Generation” technology for standard cellular networks. This technology is introduced in 2019 but still not widely penetrated across the world. 5G is expected to be 10 times faster than its predecessor 4G LTE.

Which makes 5G the fastest cellular network in the world.

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