SIM ( subscriber identity module or subscriber identification module ) is the card which is used in the mobile. A Sim is an integrated circuit which stores the service subscriber key ( IMSI ) which is used to identify a subscriber who has mobile connections like computers and mobile phones.
It is a removable sim card and can be transferred from one phone to another.
First the sim cards were made like the present day credit cards, but the development of smaller sized mobile phones prompted smaller sized sim cards development. These were mini sim cards and were of the same thickness of the older and bigger simcards but the length and width were reduced to 25 mm × 15 mm.
Sim Cards store informations which are network specific and used to authenticate as well as identify their subscribers on the network. The most important information stored in the sim cards are ICCID,IMSI, Authentication keyLocal area identity (LAI) and an Operator-Specific Emergency Number.
The SIM can also store other specific data such as the SMSC (Short Message Service Center) number, Service Dialing Numbers (SDN), Service Provider Name (SPN), Advice-Of-Charge parameters and Value Added Service (VAS) applications.
Showing posts with label Mobile Glossary. Show all posts
Showing posts with label Mobile Glossary. Show all posts
Monday, June 20, 2011
Friday, May 27, 2011
Mobile Terms Glossary about the Battery life
Stand by time for the mobiles
Standby time is the time which is the officially quoted longest time a single battery lasts when the phone is not in active use but is connected to the GSM network all the time.
The standby time is highly dependent on the cellular network lik the distance to the closest GSM cell tower or the base station. If you use the phone while travelling , like in a moving vehicle, also affects the battery life.
Likewise the Talk Time is the officially quoted talk time , the longest a single battery will last when you are continuosly talking on the phone. This also just like the standby time is dependent on the cellular network and the distance from the GSM to the cell station. Moving fast while talking also affects the battery life.
Music Play back time is the longest time officially quoted by the manufacturer that a single battery charge will last if you are using the phone continuously for listening to music only. These numbers work usually when the handsets are set in flight mode that is all the transreceivers are off and the headphones are used instead of speakers.
Manufacturers measure the talk time, standby time and the music play back time, in very much controlled conditions and the quoted numbers are rarely reached in the real life. You can use those numbers while comparing the handsets, as a reference, but only of the same manufacturer as the calculations vary from manufacturrto manufacturer.
Some times the place in the specifications will be empty, as all the manufacturuers do not disclose the number of hours at the time of launching the product. Later, only when the product hit the market the standby time as well as talk time gets revealed.
Standby time is the time which is the officially quoted longest time a single battery lasts when the phone is not in active use but is connected to the GSM network all the time.
The standby time is highly dependent on the cellular network lik the distance to the closest GSM cell tower or the base station. If you use the phone while travelling , like in a moving vehicle, also affects the battery life.
Likewise the Talk Time is the officially quoted talk time , the longest a single battery will last when you are continuosly talking on the phone. This also just like the standby time is dependent on the cellular network and the distance from the GSM to the cell station. Moving fast while talking also affects the battery life.
Music Play back time is the longest time officially quoted by the manufacturer that a single battery charge will last if you are using the phone continuously for listening to music only. These numbers work usually when the handsets are set in flight mode that is all the transreceivers are off and the headphones are used instead of speakers.
Manufacturers measure the talk time, standby time and the music play back time, in very much controlled conditions and the quoted numbers are rarely reached in the real life. You can use those numbers while comparing the handsets, as a reference, but only of the same manufacturer as the calculations vary from manufacturrto manufacturer.
Some times the place in the specifications will be empty, as all the manufacturuers do not disclose the number of hours at the time of launching the product. Later, only when the product hit the market the standby time as well as talk time gets revealed.
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