Mobile Phones Flashcards
What does ICCID stand for?
integrated circuit card identifier
What is the ICCID?
Each SIM is internationally identified by its(ICCID). ICCIDs are stored in the SIM cards and are also engraved or printed on the SIM card. Number is up to 19 or 20 digits long
Comprises:
Major industry identifier (MII), 2 fixed digits, 89 for telecommunication purposes.
Country code, 1–3 digits, as defined by ITU-T recommendation E.164.
Issuer identifier, 1–4 digits.
What does he IMSI stand for?
International mobile subscriber identity
What is the IMSI?
SIM cards are identified on their individual operator networks by a unique International Mobile Subscriber Identity (IMSI). Mobile network operators connect mobile phone calls and communicate with their market SIM cards using their IMSIs. The format is:
The first three digits represent the Mobile Country Code (MCC).
The next two or three digits represent the Mobile Network Code (MNC). Three-digit MNC codes are allowed by E.212 but are mainly used in the United States and Canada.
The next digits represent the Mobile Subscriber Identification Number (MSIN).
What does SIM stand for?
subscriber identity module or subscriber identification module
What is the SIM?
integrated circuit that securely stores the international mobile subscriber identity (IMSI) and the related key used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers).
What does the SIM contain?
ICCID, IMSI, security authentication and ciphering information, temporary information related to the local network, a list of the services the user has access to and two passwords: a personal identification number (PIN) for ordinary use and a personal unblocking code (PUK) for PIN unlocking.
What is the IMEI?
International Mobile Equipment Identity – the serial number of the handset. It is generally printed on both a sticker attached to the phone and stored electronically within the handset.
What is a memory card?
A data storage device that utilises non-volatile flash memory to store data. Non volatile memory retains stored data when power is turned off. Common forms of memory cards include SD Cards, MiniSD Cards, microSD Cards, M2 cards, MultiMedia Cards, CompactFlash Cards, Memory Stick Micro, Memory Stick Duo and others
What is SMS?
Short Message Service – A messaging service for mobile phone systems where messages are broken down into 160 character blocks.
What is a USIM?
Universal Subscriber Identity Module - the 3G equivalent of the SIM card. Physically a USIM card is the same size and appearance as a SIM card, however a USIM card has a larger storage capacity and permits access to 3G mobile phone networks. A USIM’s data contents can be divided into two separate areas (called partitions). This is to enable the access to both 2G networks when the card is inserted into a phone that does not support USIM or is not on a 3G network.
What is the Service Centre Timestamp?
The timestamp reflects the date and time recorded by the Service Centre when it handles a message. It does not reflect the date and time on the phone.
What user information is on a SIM?
Most SIM cards store a number of SMS messages and phone book contacts. The contacts are stored in simple “name and number” pairs: entries containing multiple phone numbers and additional phone numbers will usually not be stored on the SIM card. The number of contacts and messages stored depends on the SIM; early models would store as few as five messages and 20 contacts while modern SIM cards can usually store over 250 contacts
