SIM CARDS
Mobile phones need SIM cards to connect the user to the network.
A SIM - stands for
Subscriber Identity Module - is a piece of plastic integrated with small IC (integrated
chip) slotted into your smartphone (or
mobile phone) that is your unique ID, so that you can connect to a mobile phone
network. This lets you make calls,Connect to the Internet ,texting,send MMS.
The computer chip on a
SIM doesn’t have much memory, but it stores a host of information needed to
connect to a mobile phone network.
This includes a unique ID called the IMSI
(International Mobile Subscriber Identity) which is used to connect someone calling
your mobile number to your phone, rather than to someone else’s.
GSM VS CDMA-
Earlier two types of
Sim are categorized- GSM (Global System Module) and CDMA (Code Division
Multiple Access).
GSM
supports transmitting data and voice both at once, but CDMA have not this
feature.
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GSM is globally widely used and
available.
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CDMA is available in fewer
countries and carriers.
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42Mbps in HSPA (3G).
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3.6Mbps in CDMA.
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GSM technology converted the voices at either end of a call into encrypted digital data before it was sent over the network ,the SIM also stored the 'key' (essentially a passwor) needed to decrypt this data.
Since the CDMA is not as portable as GSM ,this technology is not more remains. All Operators prefer on GSM.
Since the CDMA is not as portable as GSM ,this technology is not more remains. All Operators prefer on GSM.
SIM SIZES-
Here are the dimensions of the different types
of SIM cards.
- Full SIM — 85 mm x
53 mm
- Mini SIM — 25 mm x
15 mm
- Micro SIM — 15 mm x
12 mm
- Nano SIM — 12.3
mm x 8.8 mm
- Embedded SIM — 6 mm x 5
mm
NUMBER SERIES OF SIMs -
All mobile numbers in India start with 9, 8, 7 or 6 which is based on GSM, WCDMA and LTE technologies.
Since, day by day the increment of mobile user cause to
expand the number series to assemble the new user to a new ID.
First of all, the number series was started from 9
First of all, the number series was started from 9
and after the continuous expansion of users it
shifted as 8,7, and till at number 6 series.
A New blog will be published later on E-SIM.E-SIM is the upcoming feature come in smartphone.
A New blog will be published later on E-SIM.E-SIM is the upcoming feature come in smartphone.
All mobile phone numbers are 10 digits long.
The way to split the numbers is defined in the National Numbering Plan 2003 as XXXX-NNNNNN. Here ,XXXX identifies the network operator and the telecom circle while NNNNNN identifies the subscriber.
The way to split the numbers is defined in the National Numbering Plan 2003 as XXXX-NNNNNN. Here ,XXXX identifies the network operator and the telecom circle while NNNNNN identifies the subscriber.
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