Live Chat
  • One stop service: solve all your problems
  • Orders Tracking and shipped out notification
  • More campaigns, even more discounts!
  • Need help before making an order?
  • Chat with us in real-time.
  • For Aftersale issues, just submit a ticket. We will reply within 24 hours.
  • Multi-language service
  • 24/7 support available
Hi! Log Out Log In SIGN UP
Home > How To > What is SIM (Subscriber Identification Module) card?
2019 mobile world congress post banner
What is SIM (Subscriber Identification Module) card?

What is SIM (Subscriber Identification Module) card?

By  Steve Lowry 2018-06-22 1992 0

Mobile phone is used worldwide, every mobile phone needs SIM card to make a call, what is SIM card? How many types of SIM card? Check the below post.
Gearbest your best shopping choices

 

What is SIM card (Subscriber Identification Module)?

SIM card: A subscriber identity module is a removable smart card for mobile phones. SIM cards store the required information to identify the mobile device. It identifies not only the users’ identification, but also the service provider’s network.

 

 

international_sim_cards

 

 

SIM cards also serve as storage for SMS messages and the user's contacts. Current SIM cards can store up to 250 name / number pairs and up to 50 SMS text messages. The capacity of SIM card has 8K, 16K, 32K, 64K, the card above 512K is collectively called STK card.

Standard sizes of SIM card

Currently, the SIM cards come in four standard sizes: full-size SIM card, Mini SIM card, Micro SIM card, Nano SIM card, and eSIM card.

 

 

sim-card-evolution

 

 

Full-size SIM card: (or 1FF, 1st form factor) was the first form factor to appear. It is the most common standard SIM card, is also called big card. Size: 85.6 x 54 x 0.8mm.

 

Mini SIM (2FF) card: As the phone develops smaller and smaller, the original full-size SIM card can no longer demand the needs of development, so the Mini SIM card appears. Size:25 x 15 x 0.8mm.

 

Micro SIM (3FF) card: It is commonly known as small card, or USIM card. The iPhone 4 was the first smartphone to use a Micro SIM card in June 2010, followed by many others. Size: 12 x 15 x 0.8mm.

 

Nano SIM (4FF) card: It was first introduced by Apple corporation in October 2012. The Nano SIM measures 12.3 x 8.8 x 0.7 mm and reduces the previous format to the contact area while maintaining the existing contact arrangements.

 

eSIM ( Embedded-SIM) card: The concept of the eSIM card is to directly embed the traditional SIM card on the device chip instead of adding it as a separate removable component of the device. The user does not need to insert a physical SIM card. This approach will allow users more flexibility in selecting carrier packages or changing carriers at any time without having to unlock equipment or purchase new equipment.

 

 

Gearbest find out Mi phone IMEI  number

 

Mini SIM card  VS  Micro SIM card

Mini SIM card and Micro SIM card have no essential difference from the aspect of technology. The only difference is just their surface area, a kind of meaningless plastic surface area. So Micro SIM card is not what so-called technical innovation. In fact, the metal contact area of the Micro SIM card is a bit smaller than that of Mini SIM card, which has no any influence on its function.

 

 

Mini-SIM-VS-Micro-SIM

 

 You may also want to read:
 BLUBOO Xtouch smartphone SIM card matters
 Neecoo Dual SIM Card Adapter, makes your iPhone dual card dual standby
  Xiaomi Mi Mix 2S vs Xiaomi Mi Mix 2: behold Xiaomi's most powerful smartphone!

 

 

Gearbest phone promotion sale

Prev article:What is graphics card and which graphics cards are suitable for you?

Next article:Xiaomi Mi band 3 FAQ

You might also like: