SIM card vs SD card

by on February 23, 2010

Q: What is the difference between a SIM card and an SD card?

A: A SIM (Subscriber Identity Module) card stores information to identify a user on a cell phone network. While a SIM card can store limited amount of data it is not meant to be a storage device, it is just meant to identify a user on a network. An SD (Secure Digital) card is a type of memory card that has no moving parts and will retain the data without power.

Since the SD card is a memory card its entire purpose in life is to store data. SD cards range in size from a few hundred megs to many gigs allowing users to stores hundreds if not thousands of songs or pictures on them. SD card are perfect for portable devices like cell phones, cameras, PDAs, etc because they do not  draw power from the device to keep the information on the SD card. This means once you put the data on the card you can not only remove the card and put it in another device but it also means that the battery on the portable device wont be used up trying to keep the data safe.

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