This blog emphasizes on the programming of USIM Card (UMTS Subscriber identity module). In case of mobile network application like implementing our own 4G-LTE, 5G network etc the usage of normal SIM Cards provided by the mobile operators are not acceptable. Hence in such case the customization of SIM Card is needed which can be done using USIM Card.
The content flow of this blog follows as:
- What is USIM Card?
- Difference of USIM and SIM Card?
- How to program USIM Card?
What is USIM Card?
USIM as mentioned above is abbreviated as UMTS Subscriber identity module. Some time it is also recognized as Universal Subscriber identity module. It is defined as an entity that stores subscriber-related information and implements the security functions pertaining to authentication and ciphering on the user side in UMTS and LTE (3G and 4G) devices. It can be programmed manually which runs in a UICC smart card inserted into the phone. UICC is a Universal Integrated Circuit Card which is basically a new generation SIM included in cell phones or laptops for some high speed wireless 3G networks. The UICC identifies you to your wireless operator so they know your plan and services.
Difference between USIM and SIM
How to Program USIM Card?
In order to program the USIM Card, you need to first download the source code file from the open-cell website.
Prefer downloading the source code in Ubuntu operating system ( Any version is fine )
Once the uicc source code is downloaded, insert the USIM Card in SIM Card reader and connect to the CPU for processing as shown below:
Open the terminal and provide a path using cd commands and further run the program as shown below:
Further debug the card to read all the data which is already build in card.
sudo DEBUG=y ./program_uicc
Now with the help of help option we can identify the commands in order to change the IMSI number for a given USIM Card
sudo ./program_uicc –help
For Setting the IMSI number type the command mention below:
sudo ./program_uicc –imsi 20892———
For setting the ADM code type the command mention below:
sudo. /program_uicc –adm 80508———
NOTE:
DON’T try adm option with random codes. If you try continuously a wrong adm, then it may result in to blockage of the card.
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