The SIM card is responsible for giving you access to a carrier’s network via mobile data or making calls and also supports information about several key aspects of the device and also for Sim unlock iPhone.

This card only allows users to save some specific data because they do not have enough storage. It’s so small that it’s usually part of 64 and 512KB, but the norm is for them to be 128KB. As you may have noticed, space is limited, making the information specific and essential.

Information stored by SIM cards are:

• Personal mobile number
• Operator data
• Contacts
• Billing report
• IMEI
• Map status
• Postal code

As you can see, the information is essential to maintain the security and operation of the mobile. Of all of them, the only ones the user can manipulate are the contacts; the rest are specifically for your security. If you want to be informed about the advancement of SIM cards, let me tell you that Xiaomi will release a SIM card that works as Micro SD.

SIM cards are getting smaller, but they retain their capacity

Today most smartphones use the nano SIM card; this card is much smaller than the first one that was created (SIM). The value of this lead is that the size reduction does not affect card storage, as this reduction is in the excess plastic that lines the chip. This reduction was made to take advantage of the space of the internal components of the devices.

SIM: 85.60 mm long, 53.98 mm wide, and 0.76 mm thick.

Mini-SIM: 25.00 mm long, 15.00 mm wide, and 0.76 mm thick.

Micro SIM: 15.00 mm long, 12.00 mm wide, and 0.76 mm thick.

Nano YES: 12.30 mm long, 8.80 mm wide, and 0.67 mm thick.