3G networks for cell phones allow for better access when working with the Internet. This provides faster loading times and better streaming options for video. To properly access the network, you must have a 3G SIM card. The card has data that allows the cell phone to access the network.
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A SIM card is a subscriber identity module that stores customer information. Everything from contact lists and security codes are stored on the card and can be taken from cell phone to cell phone. The SIM has its own individual ID number linking it to the user. The size of the card is 86 by 54mm for standard, 25 by 15mm for mini and 15 by 12mm for the micro.
IMT-2000 "International Mobile Telecommunications" worked to formulate a plan to set up a standard for third-generation phones. This determined at what frequency the SIM cards and phone would operate. This forum decided on a spectrum between 400MHz and 3 GHz. This is what allows SIM cards to be interchangeable from phone to phone. All of these cards work within this frequency.
In order to comply with the new requirements, all SIM cards are of the same thickness. The three sizes all measure three-quarters of a millimetre thick. Even though all three come in differing sizes, a case has been developed. The two smaller size cards can slide in a casing, making these cards the size of the standard SIM card.
Standard memory space for a SIM card is 16KB. As the technology progresses, manufacturers have built cards with memory space up to 2GB currently. Different companies are trying to expand on the size of the memory for SIM cards in order to work with all the multimedia options on cell phones now. These devices are memory-expanding connectors, so it depends on the size of your phone and your ability to access the SIM card area.
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