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Apple iPhone 4 Discussions
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SIM card and memory cards

networkdood 22 Apr 2010, 19:47 posted on

PHONE ARENA writes..."Micro-SIM slot, instead of ordinary SIM ...." ok, why are we comparing a SIM and a microSD card in this instance - ordinary SIM?? What other SIM would it have??? LOL MicroSD card is for external and removable storage and has nothing to do with SIM...someone over there is a little confused...


posted on 29 Apr 2010, 10:50

3. sprntfanboi02 (Posts: 41; Member since: 25 Jun 2009)


it is a smaller SIM card so there is more room for other things in the phone

posted on 23 Apr 2010, 16:18

1. darkzar (Posts: 1; Member since: 23 Apr 2010)


just some info on the difference of SIM CARDS SIM cards were first made the same size as a credit card (85.60 mm × 53.98 mm × 0.76 mm). The development of physically smaller mobile devices prompted the development of a smaller SIM card, the Mini SIM card. Mini SIM cards have the same thickness as full-size cards, but their length and width are reduced to 25 mm × 15 mm. The Mini SIM card has the same contact arrangement as the full-size SIM card and they are normally supplied within a full-size card carrier, attached by a number of linking pieces. This arrangement (defined in ISO/IEC 7810 as ID-1/000) allows for such a card as supplied to be used in a device requiring a full-size card, or for a device requiring a Mini SIM card, suitable scorings manufactured along the outline of the Mini SIM card allow it to be cleanly broken out by hand. Even smaller device sizes have prompted the development of a smaller still card size, the 3FF or Micro SIM. Micro SIM cards have the same thickness and contact arrangement again, but the length and width are further reduced to 15 mm × 12 mm. The specifications for the 3FF or Micro SIM also include additional functionality beyond changing the physical card size. SIM card sizes SIM card Standard reference Length (mm) Width (mm) Thickness (mm) Full-size ISO/IEC 7810:2003, ID-1 85.60 53.98 0.76 Mini-SIM ISO/IEC 7810:2003, ID-000 25.00 15.00 0.76 Micro-SIM ETSI TS 102 221 V9.0.0, Mini-UICC 15.00 12.00 0.76 [edit] Development of the micro-SIM The micro-SIM was developed by the European Telecommunications Standards Institute along with SCP, 3GPP (UTRAN/GERAN), 3GPP2 (CDMA2000), ARIB, GSMAssociaton (GSMA SCaG and GSMNA), GlobalPlatform, Liberty Alliance, and the Open Mobile Alliance (OMA) for the purpose of fitting into devices otherwise too small for a mini-SIM card.[1][2] The form factor was mentioned in the Dec 1998 3GPP SMG9 UMTS Working Party, which is the standards-setting body for GSM SIM cards[3], and the form factor was agreed upon in late 2003.[4] The micro-SIM was created with backwards compatibility in mind. The major issue with backwards compatibility was the contact area of the chip. Retaining the same contact area allows the micro-SIM to be compatible with the previous, larger SIM readers through the use of plastic cutout surrounds. The micro-SIM was also designed to run at the same speed (5 MHz) as the previous version. The chairman of EP SCP, Dr. Klaus Vedder, said[4] "With this decision, we can see that ETSI has responded to a market need from ETSI customers, but additionally there is a strong desire not to invalidate, overnight, the existing interface, nor reduce the performance of the cards. EP SCP expect to finalise the technical realisation for the third form factor at the next SCP plenary meeting, scheduled for February 2004."

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