Is it possible to update/modify IMSI number of a SIM card?

mobile firmware sim-card
Minh Nguyen picture Minh Nguyen · May 29, 2014 · Viewed 10.8k times · Source

Is it possible to edit an existing IMSI of a SIM card by overwriting the EF_IMSI file system? If yes then can we do this by using AT Commands or how can we do it?

Thank you very much for your help

Answer

Anurag Sharma picture Anurag Sharma · Jun 5, 2014

Yes you can change Data of EF imsi Just run the following commands

a0 a4 00 00 02 3f00 -> Select MF

a0 a4 00 00 02 7f20 -> Select DF_GSM

a0 a4 00 00 02 6f07 ->Select EF_IMSI

a0 d6 00 00 09 <9 bytes of MSI data> -> Update IMSI

These commands are ISO 7816 commands.To know more about commands and file structure of SIM.Please refer link,For commands goto page41. To run these commands you can use link

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